Hi Jason,
It sounds like you may have an old EZ-ARF. I have a couple of them stored away from way back. They were sold through Hobby Shack back in the 80's. They were state of the art at that time. Nice flying planes that went together well. I have a few of the warbirds and I believe they did have a Focke Wulf that was available. They were sought after by collectors but I haven't seen any for sale in a while. I think MRC started selling select models and may have parts but I'm not sure
www.modelrectifier.com Here is the P-51 that would have been in that series. I hope this helps you out.
Steve