I snagged a Moots Mooto X YBB frame recently. It’ll be a bit of a work in progress for a bit as I scavenged what I could from another bike. Lefty Ocho on the front and a White Ind ENO rear hub for chain tensioning to run it as a single speed.
I’ll probably grab a set of M960 XTR cranks on eBay and modify them a for 1x. The saddle, seat post, and stem will be upgraded shortly as well.