You're the first person I have heard that has done so. What supplement did you use that detailed the PC class?
Council of Wyrms had rules for Half-dragons IIRC.
I personally see the dragonmen as simply the successors to Draconians and one of the FIRST requests Weis and Hickman ever got was "We want rules for playing draconians".
Dragonmen are a much wanted race it would seem. Personally, I never understood the appeal but looking at the 3e supplements and the number of dragon-focused products as well as the sheer number of half-dragon/dragonnmen remplates races and prestige classes, SOMEONE out there has got to be buying it...
(I know many here would deny to the high heavens that dragonmen are not that popular, but seriously look at how many dragon-related things came out in 3.x...WOTC isn't in the business of producing money losers)