64 bit command line Unix like utilities - where can I find some?

None of our Unix command line utilities will work in 64 bit windows anymore. In order to be able to continue to use some old batch files (and the utilities they call), we would like to find some new versions of (eg) grep, awk, sed, head, tail etc. We'd rather not have to run them inside some kind of shell emulation but rather just at the command prompt.
  Is there some kind of utility which can be run to fool the (probably 16 bit) unix utilities that they are not running in 64bit?
  I guess that ultimately, I will have to re-write these lengthy scripts in PowerShell or somesuch.

Thanks for your help.
LAMBDA-SBROOKEAsked:
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medveddCommented:
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Gerwin Jansen, EE MVETopic Advisor Commented:
Hi, how about unxutils: http://sourceforge.net/projects/unxutils/

How exactly don't they work btw? I use unxutils, these work just fine on x64
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LAMBDA-SBROOKEAuthor Commented:
Downloaded this file and a whole raft of unix utilities are again available in Windows 64bit - Thanks very much.

As for the former solution, the Microsoft website insisted that I register but when I tried to do so, the button was a dead link - PAH! Microsoft! Anyway I don't know if the utils here would have done the trick (but thanks for the advice).
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LAMBDA-SBROOKEAuthor Commented:
Gerwiniainsen, my old utils were written in the mid 80s, so I'm guessing they are 16bit. When you try to run them, Windows (7), catches their execution and says they are incompatible with 64 bit windows.

Regards
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Gerwin Jansen, EE MVETopic Advisor Commented:
You're welcome :) May I ask why you rank the solution a B instead of A? Am I missing something?
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