I have the references to do it, but i dont think i have the skill required, but a scratchbuild of a 1/35 AC4 Sentinel (or thunderbolt, depending on what reference your reading)
Any M3 fans out there who could give me a hull that would be suitable to modify and build from would be a good start, i dont know that much about the M3 at all
AC4 with 17 pound anti tank gun
AC3 with 25 pound gun
AC1 with 2 pounder gun