Hey Andrew,
I'm not sure if you are still tracking down parts but I got a set from [
www.eckertech.com]. They are located in St. Catherines and the parts looked great. They cleaned the parts and it looks like the holes too (I am still waiting for my hardware before I will know for sure). I got the complete set at my mailbox in less then a week. They have been very helpful already, much more then the people I tried to talk to through ebay and they are very upfront with all the costs. I think all in the plastic (and a hobbed bolt, big plus) cost me just less then $120 with shipping and tax. I would definantly use them again. If you are also in the market for the hardware and electronics I am using mixshop.ca they are a bit slower and I cann't comment on the kit until I actually start building but (from my discussions with them) between what you can get a Eckertech and Mixshop you should be able to build a complete prusa for close to $700.
I hope this helps, good luck.
Mark