It may not be a production thing, but other factors (cost, scale, reliability). America could produce iPhones if they really wanted to, but it's more cost effective to do it in China.If the Russian defense industry can't produce those systems (especially SAMs, AFVs, and logistic vehicles), then Russia is really screwed in the long run.
I'm still sceptical. Russia has laws that would allow it to requisition civilian vehicles for military purposes. They could take vehicles being held in dealerships first for example.
The only thing that this makes sense for would be for parts (e.g. tyres), or drones.