T2x,finding a proper Merc for old boats like ours is fairly difficult but is doable. In your case tho you have to have 2 matching engines which can be really really tough.I have a source or 2 for motors but a matched pair makes it tough. Are the motors you have proper short shart models?If so,rebuild them and I have access to SSM lowers.Call me,205-221-1772. Robert