I’ve got a few installed. Have a look for the username dragonwynn, he’s posted quite a few campaigns for CMRT and also check out https://www.combatmission.lesliesoftware.com/RedThunder/Campaigns/index.html for a list of other scenarios and campaigns.
As for Mods if you search for Aris mods plenty of links will show up.
I would send them over but I am in the middle of setting up my new gaming laptop
MMM