I'm sorry for troubling, but can anybody help me to find NVIDIA gpu miner sources for nexuscoin. I'd like to mine it in linux, but can't find any working binaries or sources to compile.

Did you check the website? Look here -
https://nexusearth.com/mine-nexus-mint-nexus/Join the Slack group if you have any issues or questions
Sure I've checked the site. And many others. The link of NVIDIA source moves you to Windows Binaries file. Not source.