I just bought a used GRD2 that came with the GH-1, GW-1, and GT-1. I don't need them, so they're currently for sale on Ebay and Amazon. All are like-new, in the box with instructions and carry case. The GT-1 is missing a lens cap, but otherwise they're all in perfect condition as far as I can tell.
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 500wt_1156
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 500wt_1156
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 500wt_1156
http://www.amazon.com/gp/shops/storefro ... 252C5BE4PN
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 500wt_1156
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 500wt_1156
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 500wt_1156
http://www.amazon.com/gp/shops/storefro ... 252C5BE4PN