Amana Refrig. Door Gasket

Make: Amana
Model: BC20E
Mfg.#: P747025W
Item: Bottom (freezer) gasket
Part#: Whirpool D743190Q (AP110728)

According to Whirpool this part is NLA – no longer available, as at everywhere else I’ve checked. Is there some way to buy this gasket by the foot and make one myself? Or is there a better way?

MRH