If you're willing to make purchases, there's a handful of books (both digital and print) that you can purchase from websites that have both standard notation and tabs.
I've purchased many PDFs from
www.melbay.com, several of which has both standard notation and tabs. You'll need to look for them though. Unless I'm mistaken, most classical repertoire is published in standard notation.
If you go back a bit further and go to lute music, that was originally written in a form of tablature, which might be of interest to you. By tuning String 3 down to F# (instead of G), the guitar matches the relative tuning of a 6-course lute, and you may find it enjoyable to play lute tabs with that tuning.
Best of luck!