I'm not sure if any of them make flywheels.
Spec & Centerforce do. Bully & Ram appear not to.
A sales rep from Spec told me that they have mated a number of aluminum flywheels to various 3800's in the past, but don't sell one "over the counter." This fellow recommended that I send them the original flexplate so that there would be no mistakes when matching up the bolt pattern, balancing, and ring gear.
Still waiting for a reply from Centerforce...
I got it through KVR Performance at almost half the price that Ottawa Clutch wanted (go figure). I don't know if they make flywheels, but I wasn't overly impressed by them.
I remember you mentioning that it took them quite a while... Is that the only beef you had, or was there more to it?