http://www.kickstarter.com/
If PSCLASSICS started a pledge to record a Peters/Stritch sampler in NIGHT MUSIC, and got say $20,000 worth of pledges (a figure thrown around here about the cost of it)...then they'd be no risk to record.
If they didn't get the amount of money needed they would cancel the 'project' and anyone who pledged wouldn't be charged.
Thoughts?
Here is a very successful recent musical theatre-related example:
http://www.kickstarter.com/projects/511475076/help-kerrigan-lowdermilk-make-the-best-album-ever?ref=live
Videos