Pretty much, you can get them directly from Sig, www.sigmfg.com
I fly a Nitroplanes ARF version that has no dihedral, it's WAY nicer to fly that my dad's Sig Sr. which has the recommended dihedral. I can roll nicely with mine, but his rolls over and heads to the ground. I fly mine with a ASP 80, he has a Saito 80, the big 4 strokes are really nice on a Kadet Sr. If you want an ARF, Nitroplanes just re-introduced it again, Here is the blue one http://www.nitroplanes.com/90a270b-v...nior-blue.html
They have a red one too. You need to know about building planes though, take the instructions and use them as a picture guide only. Also throw away the cheap landing gear and put something sturdier on, here's mine
I had a deadstick in the wind so that landing was a bit rough and tore the landing gear off which was my fault. Overall I think it will do what you are proposing to do, even though my video review is a bit harsh.