Attached is an Excel file that lists the Frisco Depot Plans that Richard had in his files. They are posted on this site.
Wow, that's a bunch! If you scan all of those, you'll be busy for a while. A couple that I was looking for are Windsor Springs and Robertsville, listed as Robertson on the spreadsheet. I wish someone would have taken photos, I'm sure the railroad did, back when they were built because they were long gone by the 1940s-1950s. Thanks for your efforts!