I would think if Direct wanted to keep you as a customer they would give you the equipment you need. If you are otherwise happy with them call them and explain that they are forcing you to go to Dish by not supplying you with a receiver.
I have Dish and am happy. I use a receiver out of the house and an antenna on a tripod for the trailer.
I have heard more people complain about radical price increases after the "Honeymoon Period" is over with Direct than I have with Dish.
Ask for the "Loyalty Dept" or "Customer Retention Rep" when you call.