Indians For Guns

Hi All,
I have come across a .300 Westley Richards Sherwood single shot lever action rifle. Can anyone pl suggest or guide where I can get ammo for this rifle as I plan on buying this rifle.
Regards

Any particular reason you are buying this rifle?

No particular reason to start with, but after having looked around for a decent .22 for long, when I came across this Sherwood beauty, I am just too much in awe. But unlike various other calibre, this ammo is also probably extinct,at least in India as it seems. Still wanted to give it a try. If ammo is avai.,this will be a great buy.