I am interested in building 6152 RP Dial with no CG in near future. This type of the watch has been on my radar for a while, especially the one below.

Photo source: Internet
I assume this watch has plexi inserts due to dark brown numbers and indices (due to radiation). I think this dial (above) is from 3646 watch and it was installed into 6152 for early watch case test purposes. After passing the tests, and when these watches got into "small production", the dials were changed to 3rd generation (picture below, 1953 sandwich dial).
Photo source: perezcope
Where can I source 6152 case with matching crown? (just collecting information, not trying to buy yet).

I know Athaya has 6154 cases for sale, but I assume the cases are not the same.
Thank you in advance HF!