Tried to send you a PM with no luck.
Search for the thread "Spare Tire for our class C". There is a picture on the second page of the mount I used. Bought it at La Mesa RV (it is in their catalog), for $28. Very secure and mostly out of the way. Our bumper is extremely robust, multiple large bolts holding thick steel plate in place. If you bumper doesn't sound like that you may want to get it reinforced before hanging a fairly heavy spare back there. Some bumpers don't even do well with a simple bike rack so it is worth checking. If you need more pics or info just let me know. :C