Thank you!
I just received an Email from Katie that it is a 165x45 shock! that will make sourcing one much easier.

First post: just made a deposit on a 936 with 120mm - available in 3-4months. Shock stroke is 42.5, same as NS Synonym with 120mm. EDIT: Got an Email from Katie with a correction. it will take a 165x45 damper. What are my options? I found some RS and Fox options. Also a DVO Topaz - fit? Cane Creek DBAir - fit? Manitou Mara seems to be 40 or 45 only. Are there any options where I can adjust stroke easily myself?
Thanks in advance for sharing your wisdom