Don't limit your thinking to just parts supply, their technical support is equally as abysmal and these observations are not revelations to those that have a lot to do with EC.
With many examples to choose from, one of the most satisfying was a recent episode where we ordered a replacement part on a priortiy basis and after 30 days upgraded to AOG. We still had to wait another 45 or so days for the part to arrive on site. In the meantime, we had an aircraft grounded. The solution was to re-engineer the faulty component under an Engineering Order using Bell Helicopter fuel cell parts & MS bolts (because they were the best parts for the repair).
EC's excuse was that the factory did not have any spares in stock.