I got mine off eBay for ~$100.00 (Chinese knock-off)
You can install yourself, BUT IT IS SCARY!
Minimal mechanical skill needed,
just a drill, a Harbor Freight hole saw (or 2) a can of clear paint to seal metal... tiny hands help
And of course a bunch of "No Regerts"
No problem !
BTW: The Best (and SCARIEST) advice I got was to cut the BIG hole first!
(Now you're committed...) It was really just a matter of taping the template securely & accurately.
I used wide blue painter's tape.
If you are planning to add fender flares (again I got some eBay knock-offs),
you might want to combine the install, as you will have to cut the P/S flare to contour around the snorkel.Make a copy of the template, if possible.?
I DID NOT attach the snorkel to the "A" pillar (the fewer screws put in the FJ the better, IMO) I just glued a strip of a foam flooring mat from Harbor Freight to the snorkel where it contacts the "A" pillar. No problem for several years.