Halfords do a 3 part roof rack kit for puma, you'll probably struggle to find a cycle carrier that will go on the back so a roof mounted cycle runner on the halfords rack kit is probably your best bet.
If anyone is interested, send me a PM and I'll help get you guys in contact. A guy in our Dutch club was recently selling one:
http://pumadrivers.nl/forum/viewtopic.php?f=17&t=6315" onclick="window.open(this.href);return false;
I couldn't find a roof rack because of the curved nature of a puma, so I went the hard route and got myself a tow bar for the puma :grin: only for bikes and the like, not a hope of towing anything in a puma.