These pumps are made from computerpieces. Donīt ask me exactly what it was... it was broken and I thought I could put it to good use :) 
The fluid out of the pipe is made with a HotGlue gun.

On some  of my terrain pieces I use snotlings as extra decoration. This one is pretty old, from the BloodBowl-Snotling-Team. Maybe you can still get them via MailOrder, or use the snotlings from Warhammer.