Anybody know where to buy an affordable air filter for a 1990 ZX1000B3 ZX-10? Right now the best option I have seen is K&N for $47. I was hoping there would be something more affordable, but I haven't been able to find it. I would even consider a used one at the right price. I have seen cheaper filters for other bikes, but no one seems to have them for the ZX-10. If anyone has any ideas on where to get an affordable filter, email me at [email protected]. Thanks in advance.