Hi all,
If all else fails I used a set of British Mini minor door hinges.
They have slight taper. The bottom hinge is even more tapered. I just filed them both flat.
Cost was $10 Aust. for both from British wreckers here. You should find them easily.
They are the correct size as requested. Have the four posts which holds them securely.
Cheers
Bernie
Bernie Knight
Mt. Gambier South Australia