The Bullet Factory makes a 210 grain and 200grain projectile for the 375H&H.

This link should take you to their home page. Based in Qld.
http://thebulletfactory.com.au/

Good prices and yes they are no premium grade but for most Aussie uses they do a good job. I have used their 235 grains 375 on pigs, and their 358 200 grain in my 35Sambar on pigs. No exits on any but the small pigs.