Shame on me for not posting this sooner!
The soundtrack for Rance Quest Magnum has been released!
I'm not too sure on where to buy it yet, it doesn't seem to be on Getchu or Amazon. It's a possibility that it's only available on the Alice Soft official store, (verification appreciated), which sucks because it carries an IP ban for all non-Japanese computers accessing it.
Anyway, Speculation aside, here's the advert!
UPDATE: Turns out the album was in limited supply and they have stopped selling it.