Ha ha! That's got you thinking..
Actually my first thoughts were to use a Paso swinger because I love the look of the eccentric adjuster in the alloy arm.
Sadly there is only enough room for the Paso's 16" wheel, the bearings are in the arm, not the engine and it's much longer than the SS or Monster arms. It would almost be easier to make bespoke, than to do all the mods to the Paso arm.