Dave I was wrong - the Harrison and the RMC are the most similar in shape, however, on any Cobra there is a lot of fettling needed to get the edges (side, front and rear) to align well. I have lots of photos of how the edges and retaining clips are done on many different 'tops.
This thread has some pics
Hardtops but there is also this one with a nice 'stepped' edge. I am over 6ft tall and fit easily under my soft top and the hard top I am planning will be similar in shape. The mould that our CCC member has here can be used and sections can be added (for example, for the extended Harrison body that I have) and edges modified.
The Le Mans type is shown in the thread and another version of that type is shown in the earlier thread on the scratch built car in Istanbul.