In Reply to: Slightly OT - punch set posted by gusser on March 22, 2012 at 12:48:10:
Odd-shaped punches are usually extremely expensive, but a sheet-metal shop may have such a thing. Or a computerized plasma cutter or laser that can make those holes for you, or suggest someone who does.
Otherwise, use a Dremel or die grinder with reinforced cutting discs, followed by files or rotary bits.
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Follow Ups
- Ask a local sheet-metal shop? - bassbinotoko 21:14:58 03/28/12 (0)