so if I'm understanding this correctly, Cliffnotes: Vintage Speedsters used to be in Hawaiian Gardens, owner sold the business to a newcomer to the industry, who relocated to AZ and none of the builders transitioned. Vintage Motorcars moves from North Cal to So Cal, occupying the old VS building, hires all VS's former employees, and runs a grade-A operations. Unknown are the specifics of VS which is in AZ
Pretty much with a few insignificant corrections. Vintage Motorcars was formerly Vintage Spyders (same owner, Greg) and only moved form Stanton to Hawaiian Gardens adding the speedster line.
I don't know if you'll find a ton of feedback on here regarding the AZ outfit and I am unclear on ownership and change of hands there, but it seems like it may have been bought and sold a few times since leaving CA? The few VS AZ owners that posted here had a lot of rookie mistakes shown on their builds.
As LI-Rick said, used will likely be your best bet with your delivery date needs. Those of us who have built good reputations (and have the product to match) are backlogged for years at this point.
If you go down the path of finding a good used example, you have a whole new list of considerations and some will be based on your location, mainly pertaining to how it is currently titled and how that will translate to your state. This is in addition to the basics like: build quality, who did the work, is it sorted out, etc, etc...