That's right, 4WD Systems buy their Chinese ( might be untrue) locker knock offs in bulk once they have their minimum order bank full. I'm guessing 100 units at the time. So if you are lucky and obtain yours after the shipment was delivered than you are going to get it quick. Otherwise they'll happily lie and give you run around and they will not tell the straight answer.
If you ever visit their joint you'll feel like unwelcomed intruder. I stood at the counter twice fo 20 minutes or more without being acknowledged by the staff present or owner himself who walked past several times while giving me the looks which I could only interpret as: ' look the loser who drives Nissan.' They're Toyo shop first. The owner's arrogant atitude is well know by the 4WD industry insiders.
Absolutely shocking customers service was my experience. Maybe they've changed, for me "once bitten .....
Regards