I don't. But the bear bomber is very long in the tooth, and I don't think any new ones have rolled off a Tupolev production line in quite a few years. If they are new parts, they are left over from previous production runs.
Besides, canning old birds to keep others flying is a time honored military aviation practice (there as well as here). It is the most cost effective way to keep older aircraft flying.
There was active production as recently as 10 years ago. You can’t say that about B-52s.