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I purchased my actual Tufferbuffers on Ebay and there wholesaler was located near Toronto so I got them in a day. Tufferbuffers are the best quality, I would recommend sticking with them.
A slight mod of your old one,
will be the same thing, less the extra $
for the product, tax, and shipping.
If you can take a look at a modified one,
you can mod yours with a small round file
or dremmel tool.
Thats how i did mine.
I copied mine off of a buddy that spent money for one.
Maybe google for a pic or you tube?