Recommend a ramp for dog

[marytini]

Hi. First time posting on this board.
Our lab-pyrenees mix is 7yo and occasionally has some hip discomfort. We are wanting to a get a ramp to help him get in and out of our SUVs. He goes to doggy daycare one day a week, which is the only regular car ride he takes. He is 90 lbs.
Does anyone have a ramp they'd recommend?
Thanks.