This is the only one I could find - https://www.amazon.com/String-Multiscale-Fanned-Fret-Neck/dp/B07BH21LB2/ref=sr_1_1?crid=D0QFPFQOLPAH&keywords=multiscale+guitar+neck&qid=1684258588&sprefix=multiscale+guitar+neck%2Caps%2C149&sr=8-1&ufe=app_do%3Aamzn1.fos.18ed3cb5-28d5-4975-8bc7-93deae8f9840

They wouldn't share a lot of details. I know that the scale length is 25.5'' - 26.5", but he just didn't respond to my multiple questions asking for a router template or at least to understand what size neck pocket it is made for - very frustrating.