Paladin crewmen wear the same uniform (NOMEX coveralls and/or UCP/OCP camo uniforms) and helmets (CVC - Combat Vehicle Crewmen) as tankers do.

When working on/around the outside of the gun, they also wear standard Kevlar helmets as well...

...just as tankers do.

Basically all armored vehicle crewmen use the same gear. So any modern tanker figure would also work on a Paladin.
I can't see your pics, but assume you are talking about Alpine's two newer tanker figures, one of the below. Both are pretty "modern", depending on when you want to depict.
Their Modern US AFV Crew set (35071) are pretty current. They still have the old IBAS vests which were replaced around '07-'08 with the IOTV vest, but are close enough to modern to work. They are also wearing ACUs which were issued about '06-'07 through current. Also, they could be painted in the newer OCP camo (Operational Camo Pattern - looks like old woodland BDUs) as opposed to the UCP camo (Universal Camo Pattern - digital grays) as the uniform cut is basically the same.

Their US OIF Tank Crew set (35025) would also work. There is the same issue with the vest, but they are also in Nomex CVC uniforms for a little variety.
