Haven't seen one, but sorely needed. I don't think I've ever seen a part like that molded in resin--I mean, it wouldn't have a pour stub to speak of if it's done right. At least I can't envision it.
Theres a build which if fantastic by a Dana Jan of California, but I have been unable to track him down. Anyone know him? He states he will be making them but thats in 2007!!