sex furniture for riding dildo

i recently picked up a [bouncy baller]( and its been my first piece of sex furniture. i have found great fun in riding it however it has gotten 2 holes now. both on opposite sides from where the dildo attaches. i fixed the first and haven’t had a chance to fix the second yet.

I’m wondering first of all is there a good way to stuff it with something that makes it not matter about the holes and yet still be bouncy?

my next question is what sex furniture would you recommend as a good substitute? doesn’t matter if inflatable or not but preferred if about the same size.

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