I purchased and installed a combination ELT/Strobe Power Pack mounting bracket on the left side of the fuselage, behind the baggage compartment. This one went in much easier then the same universal Strobe mounting bracket on the right side. It's pretty easy if you've done it once before. I'll purchase a 406mhz ELTonce they get below $500. I expect lower pricing by the end of the year.
Area behind the baggage compartment for ELT Bracket
Primed, dimpled, and nutplates installed on ELT bracket