They actually have something now and it is on sale for $1250. Not sure of the quality of the ride or quality of the coilovers though. Maybe somebody can chime in? 17-UP Tesla Model 3 AWD BC Racing Coilovers - BR Type
Interesting. I'm sure this is another performance-oriented setup, not comfort. They're really light on information and that photo isn't even close to right since the rear springs are separate from the damper and they have a different top hat. Still, I'm glad to see more options entering the market.
I'm still waiting on my Grand Touring setup from Redwood, but they're the most promising IMO.