Cheap beach wheels for Hobie heavy duty cart?

Howdy. I have the Hobie heavy duty cart (hard rubber wheels), but I'd like some beach wheels for it. Questions: does anyone know of any aftermarket (cheaper) wheels that will fit this cart? And, if I decide to just browse Amazon, what are the specs I'm looking for (axle length, hub size, etc.)? Every time I go looking for wheels-- there are so many on Amazon, and I haven't seen any that specifically mention that they will fit Hobie carts. Even looking at Wheeleez, they sell quite a few.

Thanks for your help!

Looking more at options, it appears that the axle/hub length on the HD cart (which I have) isn't long enough to accommodate the beach wheels. But feel free to correct me on that.

Also, for anyone who has beach wheels, is it possible to take them on and off in the water? I do that now with my HD cart and stow them upside down in the scuppers while I fish. I'm wondering how hard it will be to put them on/off in the water. I have a Lynx, so I can pretty easily tilt the kayak while I do this, but I'm guess the buoyancy will make putting them on difficult.