go into
www.sctflash.com type in your zip code and up come the local to you dealers. it will note if they have a in house dyno. same goes with diablo sport tuners.their links to lacal custom tuners also shows who has and who dosen't have a dyno.
thanks to diablo i was able to find a really local tuner witha mobil dyno jet and sct with a very close by in house mustang dyno.