This would be easy to fabricate yourself. I’ll see about making some this weekend and you all can let me know what ya think.
Think about it, buy a ratchet strap, fireup the TIG welder, and bingo, vanclaw-O-mite! I can probably score some scrap aluminum and make these cheap for forum members in the BayArea. Would not cost much to ship USPS in one of their flat rate shipping boxes either.
Im thinking $50-75 for a set of two (straps not included), maybe less if I can get good prices on scrap aluminum from the local metal shop I order steel from (maybe more if not). And they would be made in the USA by a veteran. Ha!
Apparently farmers have been doing something similar for 100 years.
More good ideas:
https://youtu.be/chrLCKzAVVg
Gar