Try here >> First thing you need is a spring compressor
You need this adaptor to use regular slip on seal vice the original screwed on seal
The mainspring is $18.80 and piston seal is $14.85 plus $7.95 S&H. You are more than welcome to place your order by phone with our service department @ 479-646-4210 ext 507 or via this email by providing your shipping address and credit card information.
Please let me know if there is anything else I can do for you and I will be happy to assist you. Have a great day.
Thank you for purchasing an Umarex USA product! Happy Shooting!!
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Consumer Firearm Specialist
7700 Chad Colley Blvd
Fort Smith, AR 72916
Ph (479)646-4210 Ext. 507
The main spring in 18.00 and which seal do you need for the TF89
Piston seal is 12.50
Sales & Service Department
Pyramyd Air LTD
18370 S. Miles Road
Warrensville Hts, OH 44128
888 262 4867