Jointed stirrups...can you replace the rubber sleeves?

I’ve recently unearthed some jointed stirrups that, besides the rubber sleeves on both stirrups being just about shot, are in great shape. Anyone know if these sleeves can be replaced? Doesn’t have to be rubber, but I’d rather not get creative with electrical tape. :lol:

Wrap with Sealtex Latex Bandage (bit wrap), then black vet wrap.

There are various kinds of DIY plastic out there eg

It might not cost that much less than a new pair and might not be as hard wearing but if you like fixing things rather than throwing them away you could probably make them good as new at least for a while.