Hi @stefspad Back in the seventies we bought a thing called (at the time) a "footsie roller", and I see something similar on Amazon now. Basically it has firm grooves and you roll it under your feet and toes. Take a look: https://smile.amazon.com/Wooden-Roller-Body-Back-Company/dp/B000KK2RJC/ref=sr_1_5?dchild=1&keywords=footsie+roller&qid=1598551004&sr=8-5

There is also a thing my wife used to put between her toes for her PN. I could not find the exact same thing but here is something similar from Amazon:
https://smile.amazon.com/Pedi-Soother-Solutions-Arch-Support/dp/B07CQP6Z3F/ref=sr_1_5?dchild=1&keywords=toe+spreader+for+neuropathy&qid=1598551219&sr=8-5
Maybe someone else knows how to find the other thing for putting between the toes that might be better. That's all I've got, hope it may help. Best, Hank