If starship modeler doesn't have it, try federation models. They have a pretty large list of add ons and conversions. The only trouble with their site is that you have to go through all of the listings to find anything. And they have a lot listed. Also, don't just look under models, try the other categories as well.f
--smiles--
Glad I could help. Might even be able to help you with the conversion kit.
Like I said, mine's still in the stash. Right now, it's at the low end of the queue for me