If you want it, you have to pay for it. The vendor is not stocking the part, and therefore should not be expected to "front" you the money.
You order the part, then you wait for it. That's typically the way it goes. This is why many online shops lie and say they have inventory when they don't and then drop-ship directly to customers.
If you want the part when you pay for it, I suggest finding a place near you that actually stocks the part, or consider travelling a little to find a place that does.