If shipping to the US wasn’t as much as the actual straps, I’d be giving these a try:
Anybody using Armstrong Strap for rear foot and wingfoil?.
Does it pop open after being stepped on for a while?
Does it twist when putting foot in with booties (strap twist,not rotation at the screws)
I use my own DIY EVA foam and rack straps,perfect for front foot but the rear is always getting flattened if i step on it for some time.