Advise Please: Pavoni Stradivari steam valve body replacement

[kayman_se]

Hi all, my steam wand is leaking. Usually only replacing the valve stem does not solve that issue, so also replacing the valve body us my plan.

Question is, can it be done on a STH?
The spare part 31114141 seem only to be for the Gran Romantica. On the STH the body seems soldered to the body.

Anybody have experience with this?