Some Ideas to complete your modification.....
LM386 audio amp kit-
or assembled-
Miniature version assembled, may fit inside the Shari.
Got prime?
I'd use this speaker so you have external volume control at speaker......
Then there is this, to impress your ham club buddies at show and tell..
Regards,
Larry W8LM
-ARRL Life Member? -Licensed 54 years.
Larry Macionski