Add USB and/or Bluetooth Music Streaming to JBL-equipped Corolla?

[toyweb]

Is there any way to add a USB port that can play audio from a USB flash drive and/or A2DP capability via installing an aftermarket adapter to the factory JBL system?

[toyweb]

To have the upgraded JBL system and also have bluetooth stereo streaming on the same car, is there any reason the dealer cannot install Blu Logic on a Corolla with JBL? You could then just ignore the handsfree function of the Blu-Logic, simply pair your phone's the handsfree with the JBL system and pair the A2DP streaming function of your phone with the BLU Logic.
Would everything still work as expected (such as having the streaming music muted or paused automatically when you use the JBL's handsfree bluetooth to make a phone call)?