I see a lot of suction cup mounts but the housings are on an angle for use in a cars rear window. Is there any simple way to mount these on the vertical back window of a truck? any product suggestions? I would like to put some LED strobe bars on the windshield and the back glass of my truck. Not interested in the roof mount light on this truck like I had on my old truck. Ive been googling for ideas but cant come up with anything. Pictures would help if anyone has some.