Mailing home my board

I have been in CA for the summer and bought a longboard. I am going to be driving home back to Illinois and want to take my board. The car we are taking back is really small and I cannot take it home on top of the car. I want to ship it home but UPS/FED EX/USPS will not take my board because it is too big (9' 6"). Any suggestions on how I can get my board home?