Same here, to which I'd add the M56 Scorpion SPAT. I'd buy one of each at least purely as display models and I'm sure a few others out there would do the same. Unfortunately I doubt that it will ever see these for two reasons. Firstly they would have to be really popular sellers, to cover the cost of producing them. As only the M56 saw action (five went to Vietnam) of any sort in reality, they are likely to appeal to only AC57 players, a niche market at best. Secondly as the vehicles people already use are often 'outsize' to an extent (1/43 to 1/48), they would probably need to be 1/48th scale, so as to not look too small next to them. As most '28mm' vehicles are made to about 1/55th scale, they would pretty much be in a class of their own.
Vehicles like the M38 Jeep and the M37 utility truck might be an option though as there's a wider market for them outside of AC57. I'd buy any model of US vehicle from the 1950s-60s, but I'm odd like that.