This should be the first thing you find in the boot of every MGA, hanging in a few clips attached to the rear bulkhead above the spare tire. Every one of them had a crank hhndle, and it was the last model of MG that had a hand crank.

On 12/8/2007, Bo Ficula wrote:
"Do you happen to know the dimensions of the "correct" crank handle for a 1962 MGA?"

Yup. It is made from 5/8" round bar.
Long run is 25-1/4" overall, 24-5/8" inside the bend.
Cross run is 7-1/2" overall, 6-7/8" center to center, 6-1/4" inside the bends.
Short end is 4-5/8" overall, 4" inside the bend, including the spinner tube.