Remington is loading this cartridge now and it is offered for sale already. Midway also has the brass. There are several good bullets that can be handloaded in this case.

6.8 mm translates to .270, so there are a good range of bullets that will expand for hunting.

There are 3 or 4 companies that are making this upper. Also, a couple of rifle manufactures are making a bolt gun in this cartridge. A quick search on the web will reveal several good articles.

Here is a good one. http://apollo.demigod.org/~zak/firearms/6.8SPC/faq.php

Edited to add- A couple of the die makers will make a custom set for around $90