How much would you pay for a modern tech 15" 60 series performance streetable tire?

There are at least 1,14715" tires designed for passenger cars and/or passenger car competition.

Specify the exact size or sizes you are looking for and we can move forward. I'm hard pressed to believe none of them will fit the bill.

I'm also curious, because you said period correct, what wheels you plan to run and if you want black wall or white walls, white lettered, red line tires, etc?

Period correct in terms of diameter. I know most of our cars came with 14" wheels...but 15" wheels were readily available.

Let's stick with something middle of the road (no pun intended ;) )
245/60/15?

DOT legal, summer compound, wide, flat tread blocks with no sipes, Z rated, sidewall designs suited for cornering.

Is there anything even close?

How about an all season 15" 60 series tire with modern tread, 130mph continuous speed rating and they are actually round for under 75 bucks each?
I run these on my car and noticed a MAJOR improvement in traction and cornering.
Also heard (not verified myself yet) that they are rotatable side to side.
I was skeptical of course but figured I'd give them a try and really like them, as like I said they stay round:D and very quiet on the road.
They are made by Sumitomo Rubber. (6th largest tire manufacturer)

I have no doubt that these are pretty decent tires but they're still all-seasons, aka "no-seasons." :D In any case, these will sacrifice surface area for wet road performance and tread compound for cold weather use.