Due to a number of requests to share my VNA fixture design, I have made them available at OshPark.com using the following link. Boards can be ordered directly at that link in multiples of three very inexpensively (about $11). Drop me a note at ko7m at arrl dot net should you encounter any difficulty in obtaining them.
The tactile switches used on the board are available at mouser.com at this link. As always, I would be happy to help you succeed in implementing this board should you so desire.