I ended up buying some 5 in bolts and running them through the mount to make up the depth of the rim. It feels really secure and does not bounce. Attached some photos. So $30.00 for the mount and about $5.00 for the bolts.
They are galvanized so they should be fine for awhile, maybe pick up stainless steel down the road. Still need to find a decent jack and impact gun but for now at least I will have a spare for the tow truck driver right..
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