For what it’s worth I don’t know what a Bufallo River safe is . However recently lost a bundle of keys . No security problem , miles from home and nothing on them to identify my address . A set of cabinet keys were on them , so I dug the spares out from their hiding place and went to a local “ proper locksmith “ who measured the keys with gauges etc . I was expecting a stuffing , but was pleasantly surprised to find that 2 seven lever keys , and a locker style key for the inner “ Ammo section “ cost me the princely sum of £12 including cutting !
So find a real locksmith and take the key down. The guy I went to in Huddersfield must have had a million blanks , and could order what he didn’t have .