Don't bother man.. it will cost you 3 times more to rebuild the C52 transmission than it would cost you to pick up a C56 transmission from a 20V motor from one of the AE86 guys, since most of them are doing 20V swaps into RWD Corollas, the FWD transmission is basically useless to them.
I recently picked up a C56 transmission from someone in the Toronto area because the tranny in my 89 GTS needs 2nd and 5th gear synchros (345,000km on it), I picked one up with about 60,000km for $100 CDN and I know for a fact there's about 3 or 4 people selling the same transmission for about the same price. I think someone had 3 of them just lying around.
I'll check on Dorikaze.com to see if anyone in BC has a C56 sitting around that they would like to sell. Not sure how much they would go for in BC but I'm thinking $100 to $200 the most, plus labour to get it installed at a shop. I'll let you know.