G'day,
as far as i know, all models mentioned are current production, in steel, titanium and precious metals.
Available dials include blue, black, white, anthracite/waffle finish and a beautiful grey colour.
The 40mm-variant is a comparably low production (keeping in mind the Sea Hawk II sums up to just a few hundred pieces each year) and may be dropped at some point; as far as i understand, the 42mm casework is much more in demand.
A model sold out at GP Manufacture is the limited edition "USA-71"; all 500 pieces are delivered to the distribution network and prospective buyers will need to find a piece at an GP AD.
The "waffle" dial would be reference 49900.1.11.6546
and there´s a closer view in our earlier coverage:
p178host.com
The "waffle" dial can be had in black/anthracite for the 42mm-variant only; it was possible to custom order this dial for the smaller case, but i´m not sure such choice is still supported by GP.
For specific combinations and references, i´d recommend to get in touch with a GP-authorized dealer nearby.
GP´s website does show a limited variety of available models and your dealer will be able to give some overview of what´s around.
Hope this helps?
Cheers,
Peter