Don't go to a website, PM user "electrochip" on either Digitpress or sega-16. His stuff is top notch, always comes with a reproed case with artwork but no manual. His price is $45 a game, and I know where you can get some reproed manuals if you are interested in those too.
Digitpress FS thread:
http://www.digitpress.com/forum/s...
Sega-16 FS thread
http://www.sega-16.com/forum/show...
I got my Mega Man Wily Wars from him, excellent condition. I'm pretty sure he'll have Alien Soldier in stock as well, not sure of the others.
The Sega-16 thread is a long read, but basically he said he might be getting out of the repro game because some asshole was buying his repros and selling them at over 100% markup on eBay. Buying up 4-5 copies from him then selling them at $100 a piece on the bay.
That was a few weeks back, I doubt he'd completely stop making games for that reason but you never know. I'd get in touch with him ASAP.