I have not seen an aluminum Commander with squared trigger guard. Seems that welding, machining, and finishing would be a huge project with lots of opportunity for failure.
My 1970s Commander is almost a hardball gun. I have shot a fair number of Hornady XTPs in it with no misfeeds so far.
Otherwise it is not good with SWCs, Zero or Remington JHPs.
My Combat Commander is a Horsie of a different spectrum. It is accurate, reliable, and flexible. But it didn't come from Colt that way; it has been thoroughly accurized. In fact, it is my most accurate centerfire, it shot X ring groups at 50 yards with the last of my Winchester Super Match. From a Ransom Rest. The shorter sight radius and light muzzle mean I cannot hold it as well as a GM.
So I don't see anything wrong with a birthday Commander, if it isn't just right, it can be fixed.