Adjustable Pivot Hinges for Large Doors?

[John TenEyck]

I'm making a cabinet that will have doors about 76" x 24", and weigh (guessing) maybe 25 - 30 lbs each. For several reasons, an offset knife hinge seems to be the best hinge to use, but fitting them is a painstaking process IMO, with no room for error. I've used adjustable pivot hinges on small doors from Rockler and they worked great, and they would work for this project if I could find one capable of handling doors of this size. Does anyone know of a source for hinges like this? I've looked in all my catalogs and spent hours searching the web, to no avail. HELP.

Thanks,

John