i'm skeptical this link actually works... googling around, it looks like no one might be watching this site: https://www.reddit.com/r/VintageApple/comments/6svp32/any_ac...

I've been looking for an accelerator board for my mac SE, but can't find anything reasonably priced anywhere...

Ah, well, that's too bad. And you're right, what can be found is expensive.