Wow, sorry about the long wait for an answer, but I haven't been here in a long time. I replaced the stock two-point trem on my Epi S-310 with a Wilkinson "Fit's All Strats" two-point trem from Guitarfetish. It works much better than the stock trem, and it fits just fine. Hope this helps.
Hey, I was browsing the forums looking for tips on fixing up my old Epiphone S-400 and I saw you had a post about a similar guitar (an S-310?) where you mentioned nothing on it was stock. The big problem with the mine is the original Bennder trem, which is impossible to find replacement saddles for. I was wondering if you had done anything with the trem on yours. I was thinking about trying to swap it for a GFS trem, but I'm not sure if it'll fit and I don't want to start with major surgery. Any thoughts would be much appreciated. Thanks! -Mike