Northstar Miniatures sell 28mm Artizan Designs metal models on their website. There is a 'Thrilling Tales' section of Pulp Fiction and generally Interesting Characters. They come either as single figures or in packs.
Two of those packs, available for £8.50 each are U-Boat crewmen, entitled 'Grey Wolves'. They include: a captain with binoculars, a petty officer with Schmeisser SMG, two crewmen with SMGs, and a Spandau team.
These are great figures, full of character. In size, they match Warlord Bolt Action minis pretty much exactly.
I envisage using them: as a defenders of Berlin '45 Naval section, a Sea Lion Patrol Scenario section, Very British Civil War, 7TV, and in pulp fiction skirmish games generally that are set in the interwar and WWII eras.
Highly recommended.
You can buy them here.