Is there an Eagle PCB part library for...

[soggybag]

3PDT switches?

[nomorebetts]

Gaussmarkov's Eagle libraries should have what you want.

http://gaussmarkov.net/wordpress/tools/software/eagle/eagle-2-libraries/

[soggybag]

Thanks for the reply. I have the Gaussmarkov Eagle library, which is a great help, I use these parts all the time. It has a 3PDT switch, but I'm not sure that it would work correctly on a PCB. The holes look too small and the pads are not large enough, or at least that's how it looks to me in Eagle.

[defaced]

You can print it out on paper and verify.  If it's not correct for the part you have, find a video on Youtube that walks you through how to edit parts in the library.  I wouldn't try to go it alone, its a non obvious process.