Usually I am asking for help here. This time I actually came up with something on my own. So I thought I would share it with all the people who have helped me in the past. It is my simple solution to not having a cupholder in my 122. Total expense is less than $5. First, I bought the kind of cupholder that is designed to simply drop into a large hole in a table top. These cupholders have a larger brim area that keeps them from falling through the hole. I bought mine from a marine supply store for $2, they are also available from RV supply stores.
I made a hole in the middle of the bottom of the cupholder that was about the right size for a #8 sheetmetal screw. I then removed the original screw that is located between the front seats and helps hold down the plastic duct that supplies warm air to the back seat. This original screw was a short #6 screw. I used a longer #8 screw passed it through a large washer, though the cup and into the hole that the original screw came out of. I increased the size to a #8 screw for additional strength - it went in the small hole with no problem. I used stainless steel for both the washer and the screw (cupholder get wet all the time). The cupholder went on nice and firm (I have a padded carpet), and even with a large cup it is clear of the gearshift. If you don't have a carpet you may want to put some padding on the bottom of the cup to make it firm. Mine did not need any leveling, but if this is necessary, something could be attached to one side of the bottom to act as a wedge. All I wanted was a single cup holder - my passengers can hold their cups! But it wouldn't take much genius to make a small bracket that held two cupholders to this screw.
And if you are ever concerned about going back to original, all you have to do is unscrew it and put a short screw back in the hole - nobody is the wiser.
Tom