Need help finding the correct spider gasket

[fishingsetx]

The spider gasket is gone on my multi port and there are no markings on the valve or filter. The pool is a dough boy. Everything was here when we moved in. The gasket is so gummy, im scared that if I remove it, it'll be so damaged that I wont be able to match it up.

Anyone know the make/model or the best way to find out?

 

[JVTrain]

This would be my best guess on what valve you have. Perhaps a Zodiac top mount. Zodiac Multiport Valve TM-12-H8 Parts - INYOPools.com

The spider gasket would be Praher Gasket, Diverter 1 1/2in (e-12-s1 1 1/2) - 271104 - INYOPools.com if that's the matching valve.