Anyone recognize this fuel cap interface???
 

This is on a custom fuel tank and the model/year of cap the vendor said it took is not anywhere near close.

I'm hoping someone will recognize this and please tell me what fuel cap I need to order. It's for a sealed cap (the tank is set up for external venting). The profile that it has is uniform all the way around.



Thanks in advance!



https://www.pro-touring.com/attachme...1&d=1680910984
https://www.pro-touring.com/attachme...2&d=1680911007

Whose tank is it?

The neck looks like a 95-2002 Blazer neck.

https://www.walmart.com/ip/Replaceme...4-3L/440100683