I do not have the original hinges, the kit is made by Vertical Doors Inc., which is one of the best and reliable kits out there for the Z, right alongside LSD, and GT FACTORY, but GT FACTORY is about $4000 installed

but just to make it clear for everyone, the doors DO NOT have to be opened up when you get out, you can just open them normal and never put them up, I barely ever put mine up, so they OPEN NORMALLY OUTWARD FIRST, then at the owner's discretion, they can be put up vertically