The port is soldered to the system board.  It may be a shop that can do board level SMT repairs can replace it, but it's also common for damaged ports to have also damaged the controller chip, which is also soldered to the system board.  And while that's likely also replaceable by SMT repair, the total cost including removing and reinstalling the board is likely to be a significant percentage of the cost of a replacement board. You may also want to compare the cost of a complete, working used system -- which may not be much (if at all) more expensive than the cost of a replacement board or SMT repair.  
There is some physical damage to the thunderbolt ports on the left side of my XPS 15 9575 2-in-1 laptop.  I've been trying to find the motherboard model and the specs of it to see if these are removable, but haven't been able to find a definitive answer.  Can these be easily replaced? Or are they soldered to the motherboard?
XPS 15 9575 2-in-1 Thunderbolt Port Replacement