The following is an email I got from Matt Cramer.
The wait is over – the MS3Pro PNP for the Buick T-Type / Grand National is now shipping! The initial run is going to our authorized dealers, who we're giving a chance to stock up first. Ordering through your AMP EFI dealer will give you the chance to get one before you can order them on our website. If you don't already have a preferred AMP EFI dealer, here's a list of the shops that announced their plans to carry these ECUs, in alphabetical order.
Boost Crew Motorsports, Louisville, KY:
http://boostcrewmotorsports.com/
Cruz Performance, Tampa, FL:
https://www.cruzperformance.com/
Force Performance LLC, St. Louis, MO:
http://forceperformancellc.com/
Full Throttle Speed, Fraser, MI:
http://www.fullthrottlespeed.com/
Oddball Industries, Eastlake, OH:
http://www.oddballindustriesinc.com/
Racing Products and Services, Orland, CA
https://www.boostedrps.com/
Rocket Racing and Performance, Waterford, WI:
https://rocketracingperformance.com/
Slambert Performance Engineering, Louisville, KY:
http://www.slambertperformance.com/
Matt Cramer DIYAutoTune Support