I second Pegasus. It's west on the 10 from Colton. It's actually larger than Brookhurst, but that's because it also features R/C and model railroad selections.
It has an extensive 1/72 model section and there is some scenery selections that will work as well. Additionally, Mike (Pegasus' owner) has his own range of 1/72 models and minis.
link
The 1/72 stuff is to the right and back as you enter. You'll have to pass through the diecast stuff.
GMI Games, is a little shop in Jurupa. It is closer, but mostly FoW and Warhammer.
gmigames.com
Going east about 10 miles is A Shop Called Quest.
ashopcalledquest.com
It's a mix of comic book store and some games. I've never been there, but my friends seem to like it.
Brookhurst is worth the drive (probably an hour) 10 to 57 to 91 and south on Brookhurst, but make sure you arrive there at 11 and are on the road back no later than 2 or traffic back gets gnarly.
Hopefully, you'll be driving something other than the tractor as parking is sparse at both Brookhurst and Pegasus.
Wyatt
