Removable Floor Mounted Model A Cup Holder?
1. Securely mount any conceived type of cup holder on a 3/4" thick x 11-1/4" wide plank.
2. Cut a half circle centered on front end of plank to neatly fit around the base of the gear shift to avoid having the plank slide to one side.
3. Cut length of plank to fit snugly between the half circle at the gear shift end ...... and to fit snugly at the rear, adjacent to the front of the front seat's metal frame.
4. If one is an aggressive driver, to avoid tipping over and spills, add a securely attached transverse 1 x 2 x 16" long under the rear of the aforementioned plank .... like in the shape of a ("T").
5. If so desired, cover raw wood with adhesively applied Wal-Mart's thin floor mat, wool-like material sold in rolls next to their vehicle floor mats.