If you refer to the Contaflex 126 System (not sure how to take the instamatic reference), there a simple search for i.e. "contaflex 126 adapter sony e" brings up interesting hits. Even on the lenses itself, useful comments can be found.

Here some hits:

Contaflex 126 System:
https://forum.mflenses.com/contaflex...tem-t7170.html

DIY adapter:
https://www.flickr.com/photos/737431...th/32331083995

Commercial adapter on eBay:
https://www.ebay.com/itm/203794601232

IIRC there was such system on offer in CH a while ago and I was considering to get into it, but then bailed out for cost reasons. That adapter is not really cheap and there is enough stuff already in my shop. So...