Garand action wrench question.

Hello, Does anyone have any of the Brownell's action wrenches, and would one of you mind measuring the distance between the bolts on center, and the bolt diameter? I have a wheeler wrench, and want to know if I can get away with purchasing only a Garand head from Brownells and use it with the wheeler handle/base.

See PMs.

3.25 inches center to center bolts look to be .5 inches

Thanks.
For anyone that comes across this, the Wheeler is .5 bolts, but 3 inches on center.
I may just take Jim's suggestion and make my own out of a block of aluminum.