If you play from your VHS into a video card in your computer ($150), you can record the entire tape. The record software that comes with the card will digitize it and store it in a file. Then you burn a single DVD in a file format of your choice, (DVD+R is popular and will play on 90% of the players out there), take it to a duplicating service and have as many made as you need.
There are also a bunch of online duplicating services that you can upload your file to and they'll mail you as many DVDs as you want. Cheap but not free--but then making more than a dozen or so yourself is tedious beyond words! Here's one service
http://www.dcamediasolutions.com/dvd...cation-upload/
Good Luck!