I reclaimed about seven doors from the main level for re-use on the lower level. These are very nice antique doors in oak and mahogany, originally in a hotel, and complete with numbered keys. I had another dozen or so doors custom made to match those antique doors pretty closely. I was very impressed by the prices at Allegheny Wood Works, and I was also happy with the resulting quality. I love that they post their price lists on the web. I ordered some of the doors in paint-grade poplar and some in mahogany to stain to match the antique doors.
For trim, we had the millwork supplier run custom casing and baseboard profiles to match what is upstairs. It’s remarkably inexpensive to do this. I think we paid $1.50 – $3.00 per linear foot for a complex casing milled from poplar. I don’t regret this for a second.