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 & Garfield so not sure which county this lease once belonged to. Any help would be much appreciated.