Engineering would have them, but I'm not sure they are in a format that would work for you. I'll ask come questions.
We used to put a gas strut on the rear, but it wouldn't let it open to 90 degrees so people would force it up...breaking the gas strut. Personally, I have a wood dowell and prop it up...or I have opened it up and wedged it perpendicular to the mattress.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).