I'd love to get a HPWC with a j1772 handle so I could daisy chain with a normal one and share my single 50A circuit with two chargers. I have two EVs, one Tesla, one not, so I'm pretty much guaranteed to have to deal with an adapter of some sort.
This is definitely off topic but you have a few options:
1: get two of the current HPWCs and install them to use the "load sharing" option. replace the connector for one with a J1772. QuickCharge Power will do this for you for a price. this will allow you to charge both cars simultaneously, or both be plugged in while only one is charging at the max rate.
2: get two HPWCs with load sharing, and get a Tesla->J1772 converter. there are a few on the market, including from QCP. they cost $200 plus or minus
3: wire up a splitter so you can plug in both cars simultaneously. I made one that my neighbor and I share: one side gets 30A/240V, the other 20A/240V. 30+20=50. It works very well and neither of us has yet found it too slow. the 20A leg gives about 11 mph. code says each leg has to have a fuse. I'm loathe to give instructions on the open forum because there are definitely ways to screw up and start a fire.
-Snortybartfast