Such an iconic paint scheme!
Here it is Yarmouth Model Works newest kit, #112.1. The "as delivered" paint scheme of the AC&F built 40' boxcars.
With decal artwork from Ted Culotta and custom color mixes from Scalecoat paint, sold by Minuteman Scale Models. Minuteman has the BAR blue and red in stock, and likely will have it on his website before much too long.
The kit should be up on the website in the next day or so.