Try "Lugerdoc" on this forum, and also put a listing in the Wanted to Buy section...
Be specific about what you need. Also if you want a specific number.
There is also a member on the Jan Still board that periodically lists available plates...
http://luger.gunboards.com/showthrea...ht=side+plates
Note that these often require fitting since the trigger / sear relationship depends on the precision of the fit.
Marc
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Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.