Midway has250 Savage brass Hornady in stock.
They are also showing Remington loaded 100 gr ammo for $35.99 per box, says availabe, Joe
Natchezz also shows Hornady brass in stock. Few cents more per 50.
I saw an ad for Jamison 250 Savage brass at $69 per 100. The only Jamison brass that I've used is for my 256 Newtons and even though it was a little over $1 per piece, it was worth it to me.
All of the Hornady brass that I've used has been excellent, so if you need 250 Savage brass, you're likely to be pleased with the Hornady quality.
Graf & Sons has had Hornady 250 brass for a while. Along with 87 grn Speer hot cors. Just picked some up there to try. Local gunshop just got new Remington loaded ammo for $40 a box. Wished I had hit on 30 cases at local gunshow for $20 a month a go.
Or, you could just resize 22-250 brass.
Mule Deer says he prefers resized 22-250 brass as it is of better quality. I have tried it, and it works fine. Brass is a bit short, though.