Riley, I have found on Fleebay before or you can get from a US dealer like Bob @ Fichtner Chev he is a good guy and will ship
via USPS so you dont get any duty at the door.
Bob Wendorff
Parts Manager
Fichtner Chevrolet
800-234-5284
406-628-4618
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Gotta love those Trickflows...... 435RWHP, 397RWTQ