my Fusion HU needs to be replaced (RA-205) and Fusion has discontinued that model and replaced it with the RA-55 which does not allow use of my rear deck remote. There is no room for a standard size HU without cutting into the dash. Has anyone replace the RA-205 and what did you replace it with? Still want to have the functionality of the rear remote. Current system has the 4 interior speakers and and amp pushing the 4 tower speakers. needing some advice as using a bluetooth JBL portable speaker is not working for us.