I shoved my shop vac hose down the return hole and sucked out all the air. I still ended up with huge wrinkles at the bottom. I'm going to need to pull off the beauty ring and coping strips it seems like, so I might as well just put a new liner in there if I'm going to have to go through all that anyway.

I'm going to order one tomorrow.

Thanks for the advice NEPApoolguy.