I purchased 2 modern-era Lionel Madison Heavyweight passenger cars to repaint/modify. The problem is the trucks are incomplete and need replacements. Are there any other trucks which are compatible? I am not concerned about accuracy, only function. I don't care if they are 4 wheel, 6 wheel, lighted or non-lighted. This is a fun project, so cost is an issue. I located a couple complete Williams cars online for $34. I don't know if this is my best option. Thanks.