Several years ago,, I was at SHOT,, and discussing vault doors & safes with Tony at "VaultPro". I had spoken with others,, but his description of his product, the quality & such impressed me quite a bit. I saw Jeff Quinn (GunBlast, may he RIP) later that day & he asked me if I'd seen any GOOD quality vault doors anywhere in the show. I sent him to VaultPro.
Jeff bought one from them and thanked me later.
While they are out of Commiefornia,, they are part of the GOOD folks who happen to live there.
If I were building a vault,, I'd not look anywhere else.