I agree with Focusedfx, the Stanalog fluids are cheap enough that it makes no sense to use anything else. Here's the link:
http://store.yahoo.com/stanalog/accessories.html
I've found George Stanwick to be very helpful when I've had questions about my WTRP.
http://store.yahoo.com/stanalog/accessories.html
I've found George Stanwick to be very helpful when I've had questions about my WTRP.