Dr smoke-
If you go to Keystone's website (
www.keystonerv.com) and look in the TT section, you will find the TT's that are available. Check out the ones that have bunks and are the right size for you. You'd also have to check with Alberta's Dept of Highways to find out what the restrictions are for overall length, etc. when triple towing which, BTW, is not allowed in all provinces.
You would have get a proper and safe hitch welded to the frame of the 5th - certainly not the bumper- as well as check out the additional weight that you will be towing to make sure you would be within safe towing limits/ratings of your TV, tires, etc.