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Was cruising around looking for a new back/chest protector combo and came across the Bohn site. I know that some of the track and race riders use this armor and have heard good things about it.
Looks like they're having a sale on some of the items (like the ProRacer back protector [not the Cool-Air model though])
http://www.bohnarmor.com
The ProRacer back and chest protector, if purchased as separate items, are $139 and $39, respectively. Regular prices are $169 and $49, respectively. So, you save $40 on both. (Make sure you buy them separately and not their combo deal, since the combo reflects original pricing.) This is better pricing than I have found by searching online (Indysuperbike has them for a little more.)
Happy riding.