The Thor RV Forum on iRV2 is here:
http://www.irv2.com/forums/f121/
And if you really mean a Thor Owners Club...There are 2 Thor motorhome clubs...
The Diesel RV club is:
Home
The newer club that is still forming and would service your gas coach is discussed here:
Thor Motor Coach Owners Club( tmcoc) - Thor Forums
The Thor Forum is a sister site to iRV2 of the Social Knowledge website family.
http://www.socialknowledge.com/rv-traveltrailer/
The TMCOC is visioned to be sanctioned by FMCA as are many other owners clubs. If I have read correctly, iRV2 member RVBunz is involved with the TMCOC start-up.
There is also info here on iRV2:
http://www.irv2.com/forums/f121/thor...ly-227210.html
Best luck