you will find many of those groups that you listed, and more on mfsl and dcc recordings. you'll find them used here on audiogon or i've been quite successfull on e-bay. many recordings of that era have been re-issued more recently and can be found new on the classic and earmark labels, as well as others. you can find them on-line at www.diamondgroove.com, www.amusicdirect.com and at www.elusivedisc.com, all of them are reputable and easy to deal with.
it's an ongoing search to find the one's you're after. have fun and good luck.....don
it's an ongoing search to find the one's you're after. have fun and good luck.....don