The kits were made by Suydam before California models.
Some of the kits are still made by Alpine.
http://www.alpinemodels.com/index.html
Here is info on Suydam:
http://hoseeker.net/suydam.html
This is the kit I used for Prestage Tool & Gear
http://hoseeker.net/suydam/suydam22americanchemicalandpotashpg1.jpg