Hey, Welcome to the forum
Where abouts do you live? There may be a local group for you
Projump dont supply the webbing any more (I think thats what you are talking about) and if you have calf cuffs you don't need it anyway. It is used to make the Knee bar more secure. But if you really want it you can find it at one of them places that sell knitting needles LOL
but, you have a use for it
I am not sure about where the calf cuff should be. I think it is the same as with the knee bar. Try it until they feel comfortable, somebody with them should be able to help you more than me.
Its not raining where I am
I'm now off for a bock