Thanks everyone for the great suggestions. You guys are awesome.
Well, I went back and looked at my inventory list. I DO have the MTH 30-1119 GS-4 (it's not a bantam) but it sure looks small with the passenger cars. Did MTH make a bigger version in RK or Imperial sized?
The K-line semi-scale sounds perfect. Does anyone have an product # or suggestion for where to find one?