<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Frank2005:
Stock rubber bed mat. </div></BLOCKQUOTE>

You're in luck... Here's one on EBAY. They're often hard to find but I bought one off EBAY when I had the SUT and got a really great deal. The mat definitely helps keep things from sliding around.

http://cgi.ebay.com/ebaymotors/HUMMER-H2-SUT-BED-LINER-MAT-NIB-NEW_W0QQitemZ8022550628QQcategoryZ33697QQtcZphotoQ QssPageNameZWDVWQQrdZ1QQcmdZViewItem