Searching for something comparable to the Static Stretcher

A while back a stretcher called the “Static Stretcher” caught my interest. As I’ve been busy with a few projects I never got around to buying it.
Today I went to purchase it and found the domain name is inactive and I found a few posts discussing that it’s no longer being manufactured.

I’d like some advice about what stretchers on the market are reasonably comparable to the Static Stretcher in design.