The pic below is a "flat" Moto-Lita steering wheel for a Jaguar. Predictably, because it is for a Jaguar, it it uses a Jaguar 77.8mm PCD with six attaching holes.
From the picture above it appears that the Jagusr attachment hole spacing is not equidistant.
The challenge with using this wheel on a Cobra is both the attaching bolt PCD (most Cobra's use a 62.5mm PCD) and the fastener placement on the PCD. Cobra's use a different non evenly spaced bolt pattern and Jaguar (appears) to use their own proprietary pattern. The difference in fastener placement and spline positioning on your steering hub will produce a steering wheel 'clocking' issue, when the car is going in a straight line, that will need to be resolved.
If this steering wheel or one similar to it is what you are looking for you have several choices;
Choice 1:
Make or have made an adapter to allow use of this (or similar) wheel on your existing Cobra PCD and attaching bolt pattern.
Choice 2:
Hake or have made a new hub for your steering column with the Jaguar attaching bolt pattern and PCD
Choice 3:
Check your existing hub to see if it is large enough to accommodate the mounting flange surface and register the Jaguar wheel requires. If it is, then remove the hub, to allow remachining of the hub to provide a Jaguar style register and attachment holes and reposition it on the steering column.
If this alternative is chosen don't forget to redesign the hub so the steering wheel is at 12 o'clock when the car is going straight forward.
Choice 4:
Find a Steering wheel manufacturer that is willing to make a steering wheel you like that will attach to your existing steering wheel hub.
Choice 5:
Use a commercially available dished Cobra steering wheel and forego the flat wheel design you are looking for.
I may have missed something but I believe those five choices are logically the alternatives available to you.
The only thing that remains for you to do, is to choose the alternative you prefer.
Ed