Nice job on the Kraken!
for toy conversions you might be interested in the 'Groovy Tube: Mythical Beasts" isbn 1 58476 618 6
This is a book with an attached tube of plastic monsters from mythology: includes some passable figures to pit against 1/72 fantasy figures: The kraken (looks like a prehistoric ammonite), basilisk(really a wyvern), medusa, cerebus,hydra,leviathan,minotaur,roc,sphinx,harpy,chupacabra{!!),chimera,ahuizotl(?).
some look pretty good-kraken, chimera, basilisk,, and cerebus look alright.
some look barely okay: the dragon, hydra, cyclops,and leviathan
some are way too big: medusa, minotaur, harpy
the dragon is a little small, and the roc is also small(he carries a tiny elephant)
the azhulzotl who knows? and the chupacabra looks like a guy in a rubber suit