"Politically, there's no problem as long as the company we are dealing with was not sanctioned. We have also discussed the payment arrangement, which may go through India," she told parliament members
Which Russian company?
Found this article suited as your desc.
https://www.sandboxx.us/blog/silent-eagle-boeings-plan-to-make-the-f-15-a-stealth-fighter/
Hopefully we could get the weapon package too