no idea , i don't know if they sell the clamps separately and that doesn't solve the problem of them not being very strong either .
I've got an Xtreme 25 with twin extension packs taking it to 44', I'm sure this last section is the same diameter as my gutter poles. Need to check!
My point being, you could order x1 clamp for that size and see how it fits. I can't see why it wouldn't. You could ask Mr. G for the definitive answer 😳😀