Since finding US helicopter crews has often been an issue in this forum here's what I found (and bought):
These kits are made by Nemrod (resin figure line of Historex www.historex.com).
The first kit contains a standing crew chief/door gunner and a kneeling pilot/copilot.
The second kit contains a seated pilot, a seated copilot, a crew chief/door gunner leaning out of the gunner-window and the kneeling figure looks like a pararescue operator (he wears a BDU and not a flight suit).
The figures are well detailed and wear the new issue flight vest and SPH-4B helmet.
The bad thing on these kits are that the figures all have the same face and that they are not quite cheap: both cost me 52 Euro (approx 67,76 USD)