I need that guy---the one that covered up his heater box openings with gaskets.

[In The Ten Ring]

The openings in the heater box for the heater core's tubes to poke through, those openings are much larger than necessary. Someone fixed that, I think with a master cylinder gasket.

I bought a set at Advance Auto today but the ones I bought are just a little bit too narrow. Would the guy that suggested that tell me what gaskets he bought?

Did anyone else fix this problem and how did you do it?