Looks like Ruger followed your customization . . and then some.

http://ruger.com/products/m77HawkeyeAfrican/models.html

Ebony tip, dual sling swivel locations, and muzzle brake. Not sure if cross-bolt was on earlier versions. Also noted on their site is the absence of the 416 Alaskan.

I never thought I'd grow up to be a grumpy old man, but I did, and I'm killin' it.