I'm betting that Speedster was built by Vintage Speedsters when it was located in Hawaiian Gardens before it was purchased and moved to Phoenix. Greg Leach took over the Hawaiian Gardens facility and hired the workers. (Long story). Reports are that Greg has raised the quality from when VS was operating. I know that Vintage Speedsters used that red curly alternator wire but I don't know if Greg kept it--I wouldn't have done so myself.
I suggest you loot for the list of Speedster manufacturers on the SOC site under "Resources" at the top pf the main page. You can see some prices of new cars there and I believe you will see that cars from Hawaiian Gardens or Phoenix are lower than that jacked up one from the reseller on the link you posted. The suggestions to you on here from soc members are all excellent sources of Speedsters too. Good luck---maybe we'll be welcoming you to the madness soon!