Bought four new ones. The one from the driver worked perfectly. The passenger's got too much sun in Barstow and was totally crumbled inside.
In the back I had none at all and had, because it had to go quickly, the 3-point belts installed in one piece. That looked so wrong that I have not endured.
So I ordered two sets. Once in the front, once in the rear.
Was still difficult... the shipper would not ship outside the US. Since he was of the opinion this was military goods and not exportable.
I was anyway 4 weeks later in Daytona to the race. I had them sent to the hotel.
Went to Wallmart and bought a travel bag. This then $60 for the airline as extra baggage, and since heavier than 30kg another $100 on top for extra heavy.
In sum, very expensive belts