Mid Week Match-Up: A Pre-War Sporster For W. Neff

Today's  Mid Week Match-Up request comes from W. Neff who writes:

As a city dweller with limited access to vandal-free off-street parking, I am seeking the most pragmatic choice of automobile: a cheap prewar sporting car. Open cockpit is preferred. I'm not small of stature, either (6'4"/ 270lbs) so spaciousness would be very helpful (I have been able to squeeze in a MGB without many issues, though a first generation Miata was extremely uncomfortable). No projects are sought; it should be running and driving properly. Cosmetics are not a concern of mine. In fact, I am looking for something characterful. My budget would be $20K and south (preferably around $15K).

Such a desire has been instilled through watching YouTube videos ( a true tempter of man) of a peculiarly British form of motorsport: trials. See here and here.  Other uses would be general touring, perhaps some rallies. Therefore, the retrofitting of some basic modern safety equipment (seat belts) is desirable, and I would like it to have enough power to safely use in the slow lane of the highway (45-50mph cruising). While my dream is to have a prewar Invicta S-Type or Lagonda or Alvis that would be passing vehicles on I-684 in the left lane in a display of lunacy, my budget is severely lacking.

Austin 7 and Model A specials are probably the default choice, though surely there are other options out there

DT: For my money I'd consider importing this 1929 Renault KZ3 found here on eBay offered for $12,000 buy-it-now located in Waterloo, Belgium. The original 2.1 liter 4-cylinder under the hood was rated at 35 horsepower from the factory, so it should be able to reach freeway speeds given a long enough on-ramp.  What do you suggest for W. Neff?  Comments below.