His original website is down.
I ran a search and the pictures here look right.
http://www.racingtransponderfix.com/
I would call and ask if this is John Mueller.
Novice #728
Lucas Oil - Vesrah - BD Racing - Vortex Racing - Shorai Batteries - Sidi Boots - Josh Henke
Torquasaurus #98
I messaged him about replacing the battery and he responded same day. I would think he still performs the services.
I did a little searching and it looks like he just updated his website and business name.
Even found a review online with his old website listed. Clicked the link and it forwarded to the new website.
Novice #728
Lucas Oil - Vesrah - BD Racing - Vortex Racing - Shorai Batteries - Sidi Boots - Josh Henke
Torquasaurus #98
John is a good guy!!! He is still doing the repairs. Thanks guys!
CMRA#672