Here is a brand-new repair kit that fits your Airtech 7.5 HP.  L160D Vacuum Pump.  This is for the bolt in replacement of the Busch pumps.

This includes everything you would need for a complete overhaul of your pump.  It has all of the gaskets, o-rings, seals, bearings, sleeves and vanes to get your pump back up and running.  

I can also provide the filters for this pump.  I charge actual shipping amounts and will combine shipping.

Contact me with any questions about filters and parts for vacuum pumps and I'll see if I can help.