Has anyone here done this? And/or have a recommendation for a supplier?

It's a steel skinned door with, what appears to be a wood frame and, I ASSUME, a foam core.

Looking for something around 22 x 28 for overall.

I've found some suppliers online but it's hard to see quality without actually seeing the parts.

Has anyone done one?

The plan is to cut the opening probably with a grinder cut-off wheel or maybe the dremel if i want to spend a small fortune in blades. It appears most kits sandwich together by tightening screws.