You could try Blade Racing's rallygamer, but I think that the raw space afforded to you by the DM-1 and especially the IGT2, will be very hard to beat. If you want adjustability, you could shoehorn pivot-ball components at each corner of the IGT1 and have a winner with the bodies you have access to (deltaplastik)
This is what I am using. Kyosho's Inferno GT. Based of the Inferno buggy. Its cool for just speed passes/drifting or just farting around empty parking lots. Although, I did hear that it s a class "IGT" that's gaining some interest at the race tracks. Im using the Novak brushless coversion kit with the Novak HV system on it. There is now an Inferno GT2, which is pretty much the same but based of the Kyosho Inferno Truggy chassis so it is longer. But looks a lot more scaled.