Making gems from junk (or "how I made some new goblin Blood Bowl players")

A few weeks back I picked up a junk lot of models from ebay. There were a number of old Citadel and Marauder goblins in the lot, including this unhappy looking pair with just one foot between them:

Marauder Goblin with spear (sans left foot), unknown shouting goblin (I would be too if someone had cut off both my feet)