too bad that those are influence-boot. The lower bucklewrap is made entirely of plastic that's prone to break under high stress. Looks like the boot has the same problems snowboarders have with their straps. To avoid it breaking FT has to reinforce the plastic with metalwire or redesign the buckle itself.
fulltilt is really good replacing shit. i lost a buckle off that same boot and they just sent me two for no cost. i bet they will have you covered no problem