If we can id the Chicago double-sided key Mike _does_ need, I can probably make it.
The CCL 4T1427 key, which is NOT what Mike needs, would be cut on an Ilco S1003A blank, cuts 1427 bow-to-tip. The CAT99 key I see referenced in the list archives (might open a cab back door) would be on an Ilco S1000V, cuts 33335 bow-to-tip. De