RE: TC4 accessories ?
A little more info would be helpful. When you say "frame" are meaning a roller minus electronics or just the chassis and you are in need of suspension, running gear and electronics?
If all you need is electronics, you can find decent transmiter, reciever, servo set ups at almost any hobby shop. As far as esc and motor, you can go low end chineese stuff found on EBay or higher end from companies like Novak, Tekin or Castle Creations (Mamba). I use a Turnagy Trackstar esc with a Novak Velosity 25.5 in my TC4 to race Vintage Trans Am. My radio gear is Airtronics M11 2.4ghz transmiter and reciever.
Hit the web and do a bit of research, all the info you need is out there if you take the time to look!!