Timing belt snapped.

So, I know the valves bent and the pistons got at the very least dented (1,500 RPM cruising, no boost). I'll need to replace all the valves, might as well since the head's going to be off, and the pistons. I'm rather poor, so what can I get away with not replacing? Naturally, I'd like to spend the money on OEM, however, OEM is expensive, so what's comparable? I'm thinking valve stems, valve locks, water pump, all gaskets from valve cover to oil pan, BSE kit (which caused the problem in the first place with the balance shaft belt shredding). Anything else? 1990 Mitsubishi Eclipse, 4G63T, 6 bolt engine.