2006 sv6 roof rack

Does anyone have an idea where I can get cross rails for my 2006 Montana's roof rack. Dealership says they don't sell it and that I would have to try aftermarket.
Any help I can get would be appreciated.
p.s. I have the silver rails on mine not the black ones.
Thanks,

Hmm....check at: http://www.gmgoodwrench.com/accessoriesjsp/accessorydetail.jsp?make=pontiac&model=montanasv6&year=2006&detail=06_MON_RMR&sid=1139126938821563

Have you seen silver crossmembers on a vehicle? This site (GM site) implies that only black is available....Good luck, Glen