I found an pvc return pipe with 180 degree bend at HomeDepot (I think it is 2 inch) and then found an adapter the reduces the size of the hole. I drilled a hole in either side and attached it to the deck safety lines. I positioned it so that the front bungies would also act as a an additional support so it doesn't flop around in the breeze on top of the vehicle. The following images are self explanatory:
Here is the result.