Finally figured it out. Here is the setup --



The key to the setup is a Red Voyager 1 Beat Xtractor, which takes RCA in, measures the beat, and then sends clock out via Midi. Audio is fed from the record out of my mixer. The Midi Out signal from the Beat Xtractor goes into an iConnect Midi1 Lightning cable, which connects to an iphone. The iPhone is running the iOS app MIDI Link Sync, which gets the midi clock, its start stop data, and then creates an ableton link signal. It handles tempo changes pretty well, and you can force restarts of the clock from the Beat Xtractor if things get really crazy.

The Red Voyager Beat Xtractor isn't made anymore, but I was able to find it on ebay. Hope this helps someone else until Rekordbox gets some kind of clock synchronization...