Mid-Plains Petroleum Co

Would someone have a current phone number for this company? Reviewing my Father’s Will again I have a division order dept. letter that is addressed to them. This was from 1992, never was told what to do with this stuff. Anyhow I want to find out what this lease was for, all it says is Lease No. 12095, my minerals are in McClain and Garfield so not sure which County this lease once belonged to. Any help would be much appreciated.