In a pinch, these might work for the Crank Gen and Gearbox….

http://www.rockler.com/ecom7/findprod.cfm?&DID=6&sku=9989

If this doesn't work, go to Rockler.com and do a search for “mini bin”. You'll know it when you see it.

Also, the site has cool knurled knobs that could be used for the steam adjustment knob and other details.

Cool