Check with Superclamp. Randall may have exactly what you are looking for.
I bought one of the e-track 2x4 holders. I cut the top off about 1/2" above the hole thats in the middle. I then put I believe a 5/16 bolt in the hole thats already there. Have two clamps set up like this in our enclosed and have had no issues for 2 years now.
Those are sweet, great ideaThis how i did my superclamp set up, got the info from Only Polaris. The rear is tied down with the ring rated at 4,000 lbs. total cost was maybe $50.00 from Princess auto.
View attachment 122447View attachment 122448View attachment 122450View attachment 122449