Hi Mark,
I have to agree with CoosBayLumber, I'm fortunate to live near Houston, and there are Reprographic company's at every corner. I have bought several plan sets in the last few months and I have had some "Blown UP" because I wanted a Larger Scale, and I have had some "Reduced" for the same reasons. I always have them save the scans to a file on Disc, then I can print out the various formers, ribs etc.. At home on my computer so I'm not destroying my originals. I normally use "Butcher Paper" tracings to build over as I use my building table as a JIG for any parts which are built like the Fuse Sides, Horizontal and vertical Stabs which are flat. Wings, I build using aluminum arrow shafts for built up wings so no need for plans on them and with all our old traditional Foam Wings just use the shucks.
The company I use has been very reasonable in doing this service for me and I have them saved in .pdf format as you can 'SeLect' any portion of the plans you want to work with and then send it over to your printer. I recently took a set of plans too them had them "Enlarged so I could build a larger version of a very nice aircraft. I might ad that you can check to see if they have email and you can get in touch with them via the internet.
I will give AeroTech down in Florida a plug here as they offer a Scanning service as well. Jon is very affable, and has lots of experience.
http://www.aerotech-rcmodels.com/
You can go to the website and see Jon's ad for his Custom Scanning Service.
HTH'
Tony
Boling, TX