Christopher Frost tested the 7Artisans 50mm f/1.1 M-mount lens on the Sony A6500. This lens will be available soon in ative E-mount too so it might be interesting for you to check out his video review:
Also Casey Cavanaugh tested this lens:
The Chinese company 7Artisans listed four new E-mount manual focusing lenses on Amazon.com, Amazon.de, Amazon.co.uk, and [shoplink 60402 ebay]eBay[/shoplink].