SPF implementation with fake DSN blocking via SRS

I asked this in srs-discuss and then realzed I was asking an SPF question 
so I aplogize to those on both lists for the duplication.
Are there any SPF implementations for sendmail that include fake DSN 
detection and blocking via SRS *other 
than*  http://spf.pobox.com/sendmail-milter-spf-1.41.pl?  I have scoured 
for hours and can't locate any...

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   Tom Lahti
   Tx3 Online Services

   (888)4-TX3-SVC (489-3782)
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