Replacement couch cushion for discontinued leather

Hi,
I recently purchased a restoration hardware leather maxwell couch from the outlet in their discontinued 'Toffee' colored leather. They wouldn't deliver it, and while driving it home, one of the cushions flew off onto the freeway, and was lost (believe me, I looked for weeks). They won't give me any information or help on where I might be able to purchase similar leather to have a new cushion made. Do you have any ideas where I might be able to purchase a leather that is even vaguely close? I've tried local upholstery shops, but to no avail.