Anyone have code for renting ECV

[chaoscent]

I am getting ready to rent an ECV from Boardwalk rentals. I had a couple of questions for them about not being sure of the time I will be getting to OKW so I didn't finalize it. I did see a box where it said to enter any coupons/codes. I looked at a couple of different sites and didn't see any coupons or codes for any of the rental places? Does anyone have an idea of where I might find a code or if any exist?
Thanks, Penny