these wrap around pads are amazing! You can put them on any stirrups and they’re super grippy :)
Can you clarify what improvements you're looking to make?
Are you having issues with losing your stirrups and need better grip? I have these: https://www.amazon.com/Millenium-Super-Comfort-Wrap-around-Stirrup/dp/B002HVCASK
on regular peacock stirrups and they're an amazing difference from normal stirrup pads. I almost never lose my stirrups now.
Or are you looking for something like flexible stirrups so you don't have to stress your ankles to keep your heels down? Sprenger Bow Balance stirrups have some great reviews from people with ankle and knee issues. Might be worth a try?
Try these: https://www.amazon.com/Millenium-Super-Comfort-Wrap-around-Stirrup/dp/B002HVCASK. They are SUPER grippy.
I have them on peacock safety stirrups like these: https://www.doversaddlery.com/ds-peacock-fillis-irons/p/X1-0711/ but you can put them on any stirrup.