First of all, Canon has not announced "discontinuing production of DSLRs". All they have said is that the 1DX Mark III will be the last of the long running 1D-series DSLRs, that they will not be developing a DSLR replacement for that one model. They haven't even said they are discontinuing production of the 1DXIII... Only that at some point in the future it will be discontinued and when that happens it won't be replaced by another DSLR, so.users should plan to replace with an R-series mirrorless camera such as the R3 (which is superior to the 1DXIII in a number of ways, yet the R3 costs less).
Canon has explicitly stated that they will continue to produce other DSLR models and not said one way or another if there will be new models to replace them. There was a mis-interpretation or mistaken translation of an interview of a Canon executive that several sources jumped to conclusions about. Canon came out and clarified that they planned to continue to provide various DSLRs indefinitely, as they continue to be popular in many markets. Here in the US there are six or seven Canon DSLR models to choose among... full frame and APS-C that are still in production.
Since the cameras are still in production they are still repairable. You asked about the 1DX Mark II, in particular and I don't know. That model was superseded by the Mark III two years ago. Usually replacement parts and service is still available for several years after a camera has been discontinued... but it depends upon parts supplies and there has been a worldwide shortage of some electronic components that may have some effect. You should call or email Canon themselves for any further clarification.
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Alan Myers
San Jose, Calif., USA
"Walk softly and carry a big lens."
GEAR: 5DII, 7DII (x2), 7D(x2) some other cameras, various lenses & accessories
FLICKR & ZENFOLIO
