Donnie;
I also have a 785 I purchased when it was issued. They are big, heavy engines. I also have a nice set of NYC 15” aluminum passenger cars (on the upper shelf in the pic below) which might fit your need. They were issued around the same time as the 785 (1983 - 84) and you can still find for sale on the secondary market at reasonable prices (items #9594 - 9598).