Wow, a resurrection thread. And it ain't even Easter, yet!
So if this thread is indeed back from the dead, I might offer some comments. I too developed much the same interest. Two issues … medics that I can use for gameplay, and wounded figures to use as markers for affected squad stands.
To make them:
Medics: I use Artillery crew figures. Both GHQ (preferred) and H&R offer artillery crew figures. I need many for the various guns I mount for my forces. So they are just kind of something I have in my "extras" box to pull and use as needed. Some of these figures are empty handed (the ones carrying shells don't get used as medics). An empty-handed soldier is easily converted to a medic, sometimes just by some white and red paint, sometimes (when I'm no as lazy) with some kit-bashed medic satchels added. You can also get kneeling artillery figures, though I have only done standing medics so far.
Wound figures: I have older figures, both extras that were excess to my needs when I based up some unit, and some figures from manufacturers that I have replaced in my line-up. I use these excess figures to make my wound markers. I clip them off of their base at the feet, and mash them down into somewhat awkward prone positions. I take light sheet plastics (usually clear plastic from the blister packs that GHQ models come in), cut into small irregular shapes, paint it red, and mount the prone figures on it. It is mildly excessive in the amount of red area, but I want markers I can find and handle. The irregular small shapes makes it very easy to find one to fit between the infantry figures on almost any base. So I can just plop one down on an infantry squad stand to indicate that the squad has taken casualties.
How I use them:
Medics: Just to add one more little bit of complexity to a commander's time/attention/resource challenges. I like to give each gamer some non-combatant stands which may have a game role. Often that role is related to victory points. Sometimes it is some supply vehicles (victory points are accumulated by getting combat units off of the opposite end of the board, but you must also have at least 1 ammo truck exit the board per 10 tanks, and 1 POL truck per 3 tanks, to get points for those tanks). Sometimes it is a medic team (gain 1 point for every enemy stand destroyed / lose 1 point for every friendly stand lost. But you get 1/2 of those lost victory points back each time a medic team can make it to the point of a lost unit and expend 1 action point in "rescue" activity.)
Wound markers: My preferred ruleset (ODGW's Mein Panzer) has a unit scale of one squad per stand. It takes two kills to eliminate a squad stand -- the first one just knocks it down to a half-squad strength (reduced firepower and only 1 more hit to eliminate). I mark the squads that have been reduced with a wound marker. If the squad takes another hit, I remove the squad stand but leave the wound marker in place (it tells me where the medics should go, in the case above).
Here you can see a Romanian HQ group. In the background is a comms team with a field telephone and wire spool. Center is the command squad, with officer, orderly and observer. In the foreground is a medic team. Note the satchel carried by the figure closest to the camera.
A bloody fight, as my Italians try to hold back Russian infantry charging across a marsh at Loboikivka in the Ukraine, September 1941. Even though the Russian armored cars can not cross the marsh, they have pretty much crushed the Italian infantry in the hedgeline with their fire.
My Italian medics were unable to provide useful assistance on this difficult day…
-Mark
(aka: Mk 1)
assembles and paints 
