If it's a euro torch then parts are two-a-penny and very easy to obtain.
PCBs are available from a forum member but don't worry about things like that until you need them.
It may not have a standard euro torch as my 186 came with a welding star torch, the thread on the tips were non standard and the shrouds were screw on.
If the torch is non standard you may as well buy a new one rather than deal with the hassle and expense of trying to find propriety spares. The parweld torches from weld equip are excellent and standardized so torch spares are cheap.