Todd,
I work on slammed cars pretty often and I am a creative thinker. I have seen a similar challenge in getting a slammed car onto a trailer.
I've become pretty good at finding solutions.
Every problem has a solution if we step outside of the box.......

If I paid for their lifetime package, I would drive by the place where I wanted them to do the work and measure their ramp angles.

I would then make some plywood ramp "assistors" of my own, based on my measurements and slide them under the bed until I made my periodic trek down to Firestone.

If you need someone to go with you and make some ramps, PM me.-Bob