Lol... advice on isolating them... hmm.
1 option is to buy plastic sheet (1-1/16" thick) and drill large hole in the enclosure so the jack won't touch, and some smaller holes to mount the plastic plate you make with some bolts or screws. Then you can mount the jack to the plate, and it is electrically isolated from the enclosure.
I found some parts at the hardware store to make a neat little isolator (although I drilled the hole in the wrong place initially
). I should put up a quick thread about it...