Since the Mannlicher 6.5x53.5R is sometimes called the 6.5x54R, I I found some:

http://www.ows-ammo.com/catalog/product_info.php/cPath/21/products_id/89

Its also known as .276 Mannlicher.
_________________________
The art of government is to make two-thirds of a nation pay all it possibly can pay for the benefit of the other third.--Voltaire