Help To Move Carriage Wheels

I need someone who can advise me on a realativly cost effective way of transporting a set of 4x carriage/cart wheels and their fixings from the Cleveland/Detroit area in USA over to Belfast, Northern Ireland. I'm not in to much of a hurry for them, so long as I do have them here for a speacial project ( which I'm happy to reveal) in Mar/2007. Please let me know soon, Leslie