I'd never heard of that; it looks great! Although i must register some skepticism at the claim of leanness:

http://www.ellesmerebutchery.co.nz/shoulder-bacon-sugar-cure...

It reminds me a bit of the gammon we have in the UK, which is meat from the hind leg, cured like bacon, but sold in joints or steaks, rather than thin slices, and which is quite lean:

https://www.ocado.com/productImages/281/281291011_0_640x640....

Meanwhile, in South Africa, shoulder bacon appears to be something else again:

http://www.freys.co.za/products/bacon/shoulder-bacon/