The Overloud GEM Tapedesk is similar to what SONAR has (it was their tech introduced in X3). They combine the console emulation with tape saturation. It's pricey, but they did have a special for SONAR users. It's a nice plug-in, vst2 and vst3.
A lot of the Waves stuff is on sale right now for great prices if you want to go that route.