Wanted: British Standard 5/16" Socket (3/8 drive) FOUND!

[amecks]

I need to make an adjuster tool and require a 5/16" British Standard socket with a 3/8" drive.  6 or 12 point, but needs to be in very serviceable condition.

(edit) 5/16" BS is the same size as 1/4" Whitworth.  Either will work for me.

They are available on eBay for about $15 incl shpg.  I am hoping someone here can save me a few dollars.

Thanks.
Al

6/2/14 - Found one from Jon at British Fasteners, Lyons, NY.  Less than $6 and with postage lees than $8.  Now to the workbench to make it into an adjuster tool.  Al.