Try "freightquote.com" I use these guys all the time. They are like a middle man and they find the cheapest freight out there. I just shipped a complete truck cab to the east coast, it was only $250! Talk to Drew Taylor, his number is 1 800 323 5441 x1308. Hope it works out for you.
Give Greyhound a call they ship stuff in the bottom of the dirty dog for cheap. If i remember right it was $80 to ship some fullsize bedsides across the country. The worst part is you have to pick up the items at the nearest bud depot.