This is going back quite a few years in my memory bank, BUT why do you need
to use a getter material?
Getter material is nothing more than a band-aid for a process that is out
of control, especially in terms of debris
remaining inside of the hermetically sealed package.  Getter is often
referred to as fly paper that will catch loose
particles during centrifuge testing.  If you still need to use a getter
material, you need to understand the environmental
issues of the end product.  The getter material will lose its adhesive
properties over time (this time can be reduced under
temperature cycling and mechanical shock/vibration) and the once "trapped"
material becomes airborne.
To answer your question, several sources come to mind 3M and Ablestik.

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