Screwdriver bit holder for Stanley Yankee

Does the group have any experience of screwdriver bit holder that can be used in a Stanley Yankee 131B spiral screwdriver. A friend had made one for his 130 out of a standard magnetic holder but the 131 requires a thicker shaft than the standard 1/4 inch bit holder has. Thanks in advance.
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Highland Hardware sells them and I think Lee Valley and Mc Feeley's sell them.

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On Sat, 26 Feb 2005 10:10:40 GMT, the inscrutable "am"

3 tips:
Do you have a welder? Weld a 1/4" 6-point socket or magnetic hex drive shank onto an existing bit that has been filed or ground down.
Or grind a 1/4" square end on a Yankee bit. That would allow you to use any size socket as a nut driver.
Or spend $18 here: http://pages.tias.com/8600/InventoryPage/1536862/1.html
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Garrett Wade handles them.
http://garrettwade.com/jump.jsp?lGen tail&itemID3531&itemType=PRODUCT&iMainCat=0&iSubCat=0&iProductID3531

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