Collector's Choice Music has 3 Rhinoceros albums on CD.

Here's the first one:
http://www.ccmusic.com/item.cfm?itemid=CCM02842

And here's a 2-fer with the 2nd and 3rd:
http://www.ccmusic.com/item.cfm?itemid=CCM03862

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Dave Bradley
web-accessed mail (most likely checking this from work)