You'd have to be able to ID who makes the fuse holder. Possibly they are still in business and making that style. A poke around on Mouser will likely turn it up if they're still around. Usually what i do is just order a new one of whatever is there, steal the cap and throw away the body. Or just change the whole thing if all else fails. The hole sizes are somewhat standardized so its just a matter of finding one that fits the chassis knockout.