I also love these, but they do wear out pretty quick. I found a mobile trailer selling them at Thermal last year and bought like 3-4 sets of the smaller size. They have been discontinued so stock is now limited. I’ve seen places with the larger size, but the smaller are tougher to find. I found some on ebay more recently, but yes try googling and calling places to see if they will sell to you over the phone if not listed on the website. Dover had some of the larger size back in the Spring.
Apparently there are fancy stirrups now that are similar, but you have to get the whole stirrup for $200+. They claim not to dull, but I’m not sure if I believe that.
I have taken to flipping my pro-jump ones around once one side dulls (so the ball of the foot part goes where the toe part was), so that adds to their lifetime, but I guess at some point all us pro jump lovers will have to move on
I’ve tried others (including the black wrap-around ones) and nothing compares. Pro jump also had an awesome mobile saddle holder that hangs from the stall door when at shows. Very innovative company. Sad.