Upright Freezer Seal Gasket Part number help

Our upright freezer works great.
Model number on door says 29164
small print in two different places on the door. part no 934504 and part no 988993.
16 cu feet
Frost is building up quite a bit in spite of frequent defrosting.
Would like to replace the gasket seal but not sure which one to get since I can’t reference the model number that I have online.
Does anyone have any advice on how to locate the correct seal for my freezer?
thank you in advance.