Trionpartsonline sells select genuine replacement parts for Trion quality products such as the M750. For more information on the Air Boss M750 commercial air cleaner visit the M750 product page on the Trion website by clicking here. Additional Trion parts are available by phone order, (800) 884-0002 Option 2. Availability: Usually ships in 2-3 business days. 71090-0000-0004$167.00 Availability: Usually ships in 2-3 business days. 750-1000-03$26.00 Availability: Usually ships in 2-3 business days. 750-3000-9612$76.00 Additional Trion parts and technical service are available through your local Trion distributor. The location of your nearest distributor can be found at www.trioninc.com or by calling (800) 884-0002 Option 2.