Ram Access Door Damaged

When I went to install new upgraded ram, the springs on the corners of the door, popped off. After a long time of going back and forth to the Apple Store I was able to order the replacement ram access door, it was going to cost me about $35 & they would install it for free under warranty. The Apple Store just canceled my order for a replacement Ram Access Door, due to Covid 19. I was told they can’t order it and there is nothing they can do for me.

I see used doors available for 2014 or 2015 iMac, any idea if those doors will work? How do I order a replacement part, if those can’t work? I do I find the correct part number for my iMac? Help me, I am lost in the hamster wheel at Apple!