I’m sure Nad has built his bridge by now, but I thought I’d throw this out there as I found it online while doing a similar search.
http://www.scalescenes.com/products/R012-Concrete-bridge
They are pdf file that you buy, download and then use as many times as you like! The concrete texture is bang on, and once you attach the printed images to cardstock, it has full scale depth, edges, corners…it looks like a true custom structure.
There are a bunch of structures to choose from, and you can even download the “textures” themself to allow full kitbashing and scratch building possibilities. The structures even have interior detail that can be seen through the windows.
The site has 4 free sample structures that can be downloaded, printed and built as many time as you’d like. Once you download a structure, it’s yours forever, no time limit on the file.
The biggest downside (for me at least) is that it is mostly British structures, but I think with just a little ingenuity, they could easily be made to fit a North American layout.
I haven’t built any of the structures yet, but I did download one of the free ones and have printed it out. The detail looks amazing! Best of all, it’s a cardstock structure that isn’t flat!
I should state that I am in no way affiliated with this company, I just found them during my Google searches and thought I should let people know about it.
I’m thinking that if he gets enough business from North American customers, we might be able to put in requests for North American type structures.
So have a look!