OK,
So what does the competition NOT have or no longer make.
1. Pedestrian overpasses.
Discontinued:
http://www.lionel.com/products...kover-green-6-37115/
https://www.walthers.com/atlas...kit-6-quot-clearance
https://www.worthpoint.com/wor...-pedestrian-19791730
These can also be cut in half to make stairs for elevated lines.
2. 30" long scale bridge girder plate sections that can be cut to length. One supplier makes them (26.5 inches).
3. Long stair sections with hand rails that we can cut to the length we need. Usually that involves a lot of work to piece together.