If you ask me you should buy a full spare printer 
Until today there is no part on my printer that I haven’t replaced at least once, I even replaced the laser module. If that happens to you, prepare for a really weird support from Bambu Labs end, they required me to prepay the laser at a cost that matched 1.5 H2D Full Combo 40W laser
Do people replace the hotend socks when they rip? I’ve kept using them because they seem to remain in place regardless…
Has anyone just bought a spare complete toolhead with X-Rail?
I have had 2 months downtime in 6 months with my printer so far and I’m seriously considering this, but its not inexpensive.
If you’re in EU, I can sell you mine I replaced from the H2D to H2C conversion 