discirption is lot to be desired. due you mean the extruder screw it's self

Hi Skipp -

I went into a second hand food machine store just yesterday - (I was looking at big microwaves and not screws) The closest they had there to what you need was a butchers mincing machine.

They also had some equipment there which is half broken but where parts can be used for making or repairing other equipment.

My advice is therefore look at used or new foodstuff suppliers in your area.

Manufacturers also upgrade from time to time and may scrap perfectly good stuff.

Also look at agricultural supply stores.

Should be asking 1st off...

Where the heck are you?

Imagine someone here had a machine that they somehow had, and it would cost you $50, then its another several thousand in shipping as no one knows where you are, and a local one at $100 would be better suited.

If your in Australia, I'd check out Grays.com.au there are food processing stuff in there from Australia and NZ

If you're just prototyping and need some kind of extruder...just go get a pasta extruder from any kitchen supply store. It has the same components (although not as big)