I put a precompiled version of SDLMAME for Win32 on-line. Download it here
The build is optimized for Core Duo processors. I don't know if it even runs on other Pentium class processors. If you need another version, just tell me.
Also, I have Lazarus now running on my IntelMac (it seems quite buggy, though). If you'd send me the source of one of your simulators, I'd gladly test if it compiles (and runs) on OS X.