No, I never talked to Coleman about the spindles. I designed up a Mopar knuckle with a Mustang stub axle (spindle) which allow a person to bolt on a Mustang sealed hub and then bolt on Mustang brakes and wheels. I figured that would be the cheapest way to go. The knuckle could've been built with a 1" drop also. Pretty simple concept but it takes $100K or more to make it happen and then some serious marketing in order to sell enough volume to recoup the investment. Just decided I wasn't going to risk my money on it since most Mopar guys are into the restoration end rather than the cornering thing.

Here is a picture of a few hubs I made back in the day. The black one is aluminum, the other ones are steel. Looks like I was trying different offsets.