Corvette Grand Sport by Superformance
Hi-Tech builds the Superformance line of cars, they do the composite Cobras and the Daytona Coupe for Shelby, the Rossion (nee Noble) the AC 378 Zagato (nee Perana) as well as versions of the Superformance MK II ("Slabside") for AC Cars to distribute in Europe.
They have built other cars under contract including Speedway Motors all steel '32 Ford roadster, the Joule electric car prototypes and products for other distributors. They had a deal to build the MG V8 that went south when MG did and also a deal to build for TVR that also fell apart when TVR did.
There is a great deal of skill and talent in Port Elizabeth to draw on and Hi-Tech has some very skilled workers.
There are some other contract builds in the works that I am not privvy to.
Because they are a manufacturer and not a distributor/retailer they do not advertise the email contacts. They provide the product to Superformance LLC (USA) and they in turn distribute/service/sell the product. Unless I am instructed otherwise by the factory I am not at liberty to provide an email address for Hi-Tech.
My suggestion is to contact Lance at SPF LLC or if you don't want to do that, myself and I will forward through appropriate channels any concerns, suggestions, complaints, etc. I do not have a "magic" connection to the factory but do have a friendly relationship with some people there. This does not afford me any special treatment other than a cordial friendship with some people.