Hi, first post here, joined to add to the previous brick wall thread...
Started 3D printing to make steam locomotive parts, but I fell into brick walls helping a fellow make some for a roundhouse model. I do my CAD with OpenSCAD, which is a script-based modeler, so it just made sense to me to write a script that puked out brick walls of various dimensions:
https://glenn.pulpitrock.net/customizable_models/brickwall/Change the various parameters, add a file name, click Submit and you get a .stl file of a one-sided brick wall. I haven't tested it extensively, but you should be able to import a .stl file in most any CAD program where you can add trim, cut out window holes, etc. Or, just print it and use it like you bought a sheet of brick-patterned styrene. Use freely, with attribution where appropriate.
There are a few other patterns and parts available; I'll add more as I model stuff. Printing a station model right now, which compelled me to make some doors and a gable window; they'll go out on the site eventually...