[email protected] said
Does anyone out there have a supplier for new Winchester barrels? I am looking for a 24″ half octagon/half round in a .218 bee.  I can turn a full octagon down if need be but prefer one ready to chamber and chase threads….  

Well your question is somewhat of a misnomer, as there is no physical way for there to be a “New Winchester Barrel”. As Winchester of New Haven, CT is out of business. 

Have you tried this guy:

 https://www.winchesterbarrels.com/

​WE MANUFACTURE AUTHENTIC REPLACEMENT BARRELS
for  WINCHESTER  and other collectible firearms;
MARLIN . . . COLT . . . REMINGTON and others on request.

 He probably could do a special order “Authentic Replacement”!!!

Sincerely,

Maverick