For HUNK's armor in RE2, it depends. If you want it to look exact, you go custom. This is the one I made:
If you want to go with something that looks similar but actually exists, there are a number of different bulletproof vests that look similar (with the should pads and adjustable sides).
In my opinion, Ranger body armor doesn't have the bulky shoulder look that HUNK's does. What I'm using for a film project is a SDU Level 4 Tactical Vest, but they're becoming really rare. The reason I use it is because it has a very similar look, but actually has mag. pouches on it (so it makes more sense).