Jim,
you can definitely check out eBay auctions like this: http://cgi.ebay.com/ws/eBayISAPI.dll...tem=1347581924 although I'm a bit suspect of the claim that no power supply is required. I think that for 3x8 axternal power is a big plus but you may get away without it on short cable runs.
I've heard these weren't too bad: http://www.emantechnology.com/abi001..._ID=29&CATID=2 but that was about their 3x4, not 3x8 multi-switch.