Anybody recognize this flat-flex connector?
Thanks to a comment from Nick Alexeev (above, in comments), I realized that I had managed to check Mouser, Jameco, etc. but neglected to check DigiKey (of all places).

It appears that this part is one of the Molex Easy-On™ 503555 series connectors; specifically the 5035664300. Taking a look at the datasheet, the flex side of the connector also matches the description (staggered contacts).



Thanks for taking a look, folks!