I use a Niagara address, it works well,$60 a year and drive down whenever I need to. Worth looking into. You can also use something like this Www.myusa.com
which will forward the post to you.
You should be able to pick up a set of oem turbos for under $1500, and about 10 hrs of labour.
I'm in the same boat, HATE the waste gate rattle, the JB4 does help, but it's really annoying.
Good luck with sourcing your parts..