Anyone make a M-84 conversion for Tamiyas T-72? I want to build one as an Kuwati Gulf War tank.

A company called NK Patriota made an M-84 convertion. I do not know if it's still in production but the owner advertised it here at one time. Other then that the ancient Kirin kit based off the DML t72 I the only other option I know of.

Yes NK Patriota was a way to go. But he was accused of "similarity with Tamiya turret" IIRC, and it should be resolved soon. I have the set,and it looks similar as any T72 turret looks - the devil is in the details, and that turret is a bit different, and Tamiya got some angles wrong. Try to google fro M84A (as that is the tank you are looking for), and visit Serbian and Croatian model club sites for references. You need few important things for the turret and rear right fuel cell is different (NK has it). I frequently replied on this and on ML forums on a way how to do it, so try gogling iguanac (for armorama) or MarkoH5N for ML.
happy modelling