New to forum Hi all

Hi all need a little help . I have a Murray 1978 model and part of the model number is missing 8-365?((may be 5 6 or 8 then)) x72 i cant find this model or anything like it when i search the net . Well the isue i have is the steering gear cannot seem to buy them dont make them anymore and all models i have seen that look the same have steering gear from the top and mine is under where belts are if any one can help me with this it would be with many thanks . Will try to put pictures of the mower and parts. THANKS FOR YOUR TIME [email protected] NOT to sure how to put pictures on but will email them if any interest