Then you want an M41 with a 17pdr? Even then, though, it only had frontal armor of 1.5 inches at most. It was still over 23 tons. The T23E3 had about 3 inches of frontal armor at its thickest and it was about 30 tons. I really think you're looking for the T23E3 with a 17pdr.
Cheers,
Logan