timing chain cover replace/ where to buy

I noticed a number of posts about timing chaing digging into the timing cover on 22RE. I have the head off, machined, and notice that the timing cover has 2 nice 1/16 to 1/8 inch (approx) grooves/tracks where the chain dug into the timing cover and piece of the plastic guide was broken but think I retrieved the plastic. I am thinking why take a chance and just replace the timing cover, but Toyota in Calgary, Alberta Canada wants 386.00, Napa does not have it, ebay has it from 2 places for about 30 US (quite a difference). The difference in price worries me so any suggestions as to where to buy or if the ones on ebay from cnsautoparts, aprauto, and eristicgaskets. I think cnsautoparts and eristicgaskets are the same supplier. All sell a timing cover for the same price so they are likely very similar. I have new timing chain kit with metal guides from DOA, new gaskets from Toyota, any feedback on picking up a timing cover if needed --any considerations with the cover --should I cheap out on a timing cover? as this is a pretty big job.