as far as the ebay batteries:
Best can tell this is the better one, but it is only 16a:
http://cgi.ebay.com/ebaymotors/ws/ebayisapi.dll?viewitem&sspagename=strk:mewax:it&item=130293392126
item #110363867691 is too wide, 3.5" will not go so pretty good in the frame.
I sure wouldn't be worried about ebay if the guy has good feedback, been buying stuff through that site since '97.
I got an adventure power model #ub22-12ne ($64 shipped) from powerstride. They don't show it in stock but i have other links.
http://www.powerstridebattery.com
tight fit, but its in there.
Replaces: Odyssey pc680
cca: 420, ca: 680, 22amp, l 7.13x w3.0x h 6.6, 13lb
the ub22-12ne and the ub12220 look to be the same- but the ub12220 is cheaper
also :
http://www.powerstridebattery.com/pr...&idproduct=996
http://www.batteryweb.com/motorcyclebatt-detail-ub22-12ne%20(40552)-motorcycleupg.htm
http://www.batteryweb.com/motorcyclebatt-detail-ub12220%20nb%20(40696)-motorcycleupg.htm
all bateries
http://www.batteryweb.com/motorcyclestx.cfm