Haven't looked specifically for CRJ information but the Rockwell-Collins website (
www.rockwellcollins.com) might have some of what you're looking for. All CRJs have Proline 4 avionics with DCU-400X EICAS, FCC-400X Autopilots and FMS-4000 FMS. The majority of European RJs are also fitted with R-C (ex- Flight Dynamics) Head-Up Guidance Systems (HGS).
You might also want to do a search of this forum & Flight Testing - there's been several RJ- related threads over the years. If you've got a specific question, post it here & it will probably be answered by one of the many CL65 drivers & maintainers who contribute.