By the title, I mean WAS 1 or 2 for PS2, since I like the music in both games, but the soundtrack is very hard to find, I didn't find it here, either.

The developer is Success
I assume Tryfist are the publishers, or producers.

Here's the pages that I got this info from:
http://www.gamefaqs.com/console/ps2/data/942691.html
http://www.tryfirst.co.jp/was2/index.html

Neither Galbadia Hotel, nor do ********* have it.

EDIT: I did not know another site's name would be censored. I apologize.

According to vgmdb.net, there are three soundtracks in the Wrestle Angel series with two of them being almost identical. However, like some people have already noticed, vgmdb.net is missing quite a few soundtracks. In this case, I believe there might be another Wrestle Angel soundtrack that hasn't been listed on there. That aside, the tracklisting on vgmdb.net shows that there really isn't much music on any of those soundtracks, so you may want to see if you can get an audio rip from the games instead.

If you want to purchase those soundtracks, then you're in luck as they can still be found, but you're probably going to have pay around the three hundred dollar (USD) mark to get all three/four soundtracks.

Due to the relative obscurity of the game, you might have a difficult time locating a place to download the official soundtracks, so if you want them, you may have to buy them yourself.