You could have the seats re-apolstered leather, but thats not cheap.
I once remember looking under the seat for something (prolly my piece)
and i saw that there might be a way to take off that butt piece, Perhaps others can confirm or deny that,
Normal wear and tare is expected, i would suppose the only real solution would saving up the cash to go for new racing seats.
cheap seat covers are tacky expecially over leather