Found an earlier one. This one from the Bush/Gore debates. Gore made the allegation and Bush did not deny or correct it:
"GORE: And Governor Bush has declared to the anti-choice groups that he will appoint justices in the mold of Scalia and Clarence Thomas, who are known for being the most vigorous opponents of a woman's right to choose."
http://www.cnn.com/ELECTION/2000/debates/transcripts/u221003.html
So... we search the archives/transcripts/press releases, etc., of speeches Bush gave to those groups.
I think the phrase will predate the Bush Gore debates. I haven't found a repository of stump speech transcripts or similar.
An early use of the phrase without attribution to bush is found here
http://64.233.161.104/search?q=cache:yE6MqBd27WUJ:www.nationalreview.com/daily/nr120799.html+%2B%22in+the+mold+of+Scalia%22+%2B1999&hl=en
An article from PAW in 2000 that quotes Bush as constructionist but omits quote on "in the mold".
Excellent. Thank you.
Is there also info on what the PRes. actually said regarding Justices?
This is the earliest source I can find at it appears to be the authors phrase, not Bush.
http://64.233.161.104/search?q=cache:yE6MqBd27WUJ:www.nationalreview.com/daily/nr120799.html+%2B%22in+the+mold+of+Scalia%22+%2B1999+-2005&hl=en