Welcome to
MBN!
That car is listed on RaceDezert
Pro Fx Super lite and you can see th epics are the same. The ad says it is made by Precision Fabrication Company and aGoogle search turns up nothing.
If you are going to build a buggy you could start with a Prosand frame from Girard. He sells a two seat frame that will work well. If you want a complete set of plans contact Rorty.
Good luck and start a thread in Projects in Progress when you begin!