Pinnacle can convert 45 Colt cylinders to shoot both 45 Colt and 45 acp. Looks like the conversion is only $80. I wouldn't call that "expensive" .
savit,
I just shipped a gun to the Eastern US and FedEx charged me $76 one way (UPS was the same price). When you double that for going both ways and add your $80 it becomes over $230. That's dang close to "expensive" in my book. Fine if that's what you want and have to have but it isn't cheep.
Dave