Well individually just doesn't work, your looking at around £500-£600 for one bumper or it costs the same for 5.
I do have some plans that may include a container load of body parts sea freighted, it's a bit of a logistical nightmare when ordering from multiple suppliers but I do have a warehouse facility stateside and container loads are more cost effective. Problem with the states is ground shipping is not cheap, in the uk I can send a parcel up to 30kg next day pretty much to anywhere for less than a pack of fags. America is so huge that ground shipping can be up to a week and in the $100's. It only really works (and this is what a lot of companies do) is if you take orders and be vague about shipping times ie "2-3 months" and then you hope that in those two to three months you fill up that container with orders. Whatever I decide to do I will always be up front and honest about it.