Longacre racing scales.
I got a set a couple years ago. The company located in Reno, NV
Nice folks, good price. They are good up to 1000 lbs per pad.
DAVIS MOTORSPORTS OF RENO
7320 ESTATES ROAD
RENO, NV 89506
(775) 972-6636
Looks like they are having a special.
Good Luck.
JP