A big part of the fun of owning a panerai is the choice in straps. There are loads of good strap suppliers out there, here are some of my faves:
The infamous DON:
http://www.homestead.com/rlx/DON.html
Mario Paci and TC straps:
http://www.timeconnection.biz/
BOB straps and WACCEX buckles:
http://www.waccex.de/catalog/
Panatime straps, buckles and accessories:
http://www.panatime.com/
Strap Culture:
http://www.strapculture.com/
Watch Prince:
http://www.watchprince.com
Corley straps and storage/travel boxes:
http://www.like2box.com/
There are others I would recommend who don't have sites, but can be sourced in the Accessories section of
www.paneristi.com and they are:
Molina Straps (via SteveToronto)
Kurt - The Watch Boys
Greg Stevens, for big, thick vintage straps
Gabomagic for big thick vintage straps that tan with age
Micah's Vintager
Happy hunting!