I feel for you
@MrChoi. You have to realize your "softer" feeling is subjective and from the SvC perspective, likely within spec. You are in a tough position for sure. If you go coilovers or potentially even just springs, you can get your desired ride. However, I wouldn't think the SvC will be much help here without a leaking shock. At the very least, if you do get either CO or springs...you can return to stock to sell or if the CO need replacement. Likely the new owner won't know the difference and if you are getting CO maintenance, it won't be forever. Sucks, but when you think about it that way, it isn't so bad. I'm trying to decide upon $2500 COs or just $400 springs...I want the COs but my waller doesn't.
For the record, I scoured etc.tesla.com which lists all the part numbers, and while the springs have a part number for a performance model, the dampers do not, so my "assumption" is use the AWD part number. They only list dampers for RWD and AWD. There are two part numbers for some of them and I believe these would be for the hard to soft change they made for the early cars.