I have a medical grade one I got with my first back surgery back in 1999 that works great.

Looks like this

RMS Featherweight The Original Reacher 2-Pack (32-inch) https://www.amazon.com/dp/B00UZHYXHO/ref=cm_sw_r_cp_api_glt_fabc_DAH7YRAEQ70VKGPEERYS

Just went into my purchase history and saw that I had returned exactly that one because it was so rubbish

Here was the one I ended up liking the most: https://www.amazon.com/gp/aw/d/B00UZHYXHO/ref=ppx_yo_mob_b_inactive_ship_o0_img?ie=UTF8&psc=1