Not the slightest reaction so far unfortunately (with the exception of a single proposal by private message, btw many thanks to the author, which I denied).
Maybe I should be more explicit in order to gain some interest
The idea behind this application is as follows.
The engine of my bike no longer has a dynamo (originally the engine, 1973 SFC, had an alternator at the end of the crankshaft on the right side).
As this engine unfortunately no longer exists (in one piece though) and even less the right side casings, I am currently using a modified cover.
It is useful .. but definitely ugly
The project is therefore to review and improve the design of this ugly shortened dynamo cover which I am currently using.
For this purpose I would need the central and circular part of a (damaged) casing.
Please take a second look in your part boxes.
Many many thanks for looking and for your possible help
Cheers
Stéphane

