Most any good sporting goods store. The modern designation is .32 Winchester Special.
COLORADO
Oh, dude, 39°N and 94°W longitude? That's like, the coordinates for a spot on the map. It's where you can find some land and stuff. So, if you're looking to pinpoint a location, that's where you'd be heading.
There's no city there. That point is near the center of the cultivated section (plowed east-west) bounded by 240th St, 250th St, 'I' Ave and 'J' Ave. It's about 1.43 miles west of US-169, 3 miles southeast of the center of Ogden, and 34.5 miles northwest of the center of Des Moines, in Iowa.
There are a several ways you can get to North Dakota from Brooklyn (NYC). You can fly. You can drive. You can take a bus. You could ride a bike or walk, but that would take a few weeks. If you drive, you would take I-78W to NJ-139W, then get on I-280W. Merge onto I-80W, then merge onto I-90W, then go on I-94W. Stay on I-94 until you get to North Dakota.