> And that's only when discussing reissuing
> stuff that was previously issued. Unissued stuff? They don't want
> to spend the time and money to get the clearances, so you have
> almost no hope...

Not just "clearances" (I assume you mean licensing), but the 
mastering costs (which may or may not include mixing multi-
tracks, "baking" the tapes, etc.) can be prohibitively expensive
too. 

Bryan