I Need help to find a suitable product

Hi. I'm trying to make my split-level home as accommodating for my disabled adult daughter as possible. I won't discuss her medical conditions, she asked me not to. My problem is that her Jazzy chair is 32 inches between the centers of the drive wheels which makes navigating a premade ramp very iffy. Everything is 34 to 35 inches wide at a maximum. I have searched the net using every term and modifier I can imagine and 35 inches seems to be the limit. I plan to cut one of these in half, add a piece of wood in the center to bring the over all width to 38" then add wooden guide curbs to the inside and outside of the traction surface.So, I have a solution such as it is, but I would much rather find a product that fit my needs without 4 days in my wood shop.

Suggestions welcome. Thanks