Plans are available from several sources. Some off the top of my head are Tom Dixon or from Leonard at the Stuka stunt Works.
Or if you don't want to destroy that old classic, and believe me you will trying to convert it. You can get a new lazer cut kit from RSM models for $129.00 that will knock your socks off. It's lazer cut and made from really nice contest balsa. Mine arrived yesterday.
I think that you will find that it will not be an easy plane to convert without some serious redesign, so for that matter I'd recommend the new kit, it's easier to design into a build then to retrofit. Frankly if you do convert it and get it flying post a picture of it we would like to see how it came out.
Dennis

To the best of my knowledge The RSM kit is the first time that the F.A. has been kitted. Oh and if you go to the RSM site then look at a plane called the Humbug and see if that won't impress the RC flyers. Bill Netzband the designer of both of these planes sure knows how do make truly interesting aircraft.