I sold mine but I would call Marco to see. They have the best customer service. But I would go the first link.

Either should work OK.

hi dm, pbl has both heavy duty $4.75 each. reg. one $2.50 each. marco is just a little more expensive. joe

Hey Derek...

I just changed out a plate on my Creature. It had the small little plate like the second one you posted...I replaced it with the bigger one. No issues.

Personally I was surprised they used such a small plate in the first place. The one I got from Marco was actually more heavy duty than the standard larger plates I have seen. Seems like they have more thread area for the threads on the bolt to bite.

The larger leg plate (http://www.marcospecialties.com/pinball-parts/535-7394-00)
is an upgrade from the original smaller leg plate (http://www.marcospecialties.com/pinball-parts/01-9296)

The larger one will hold up better. Use the smaller one if you really want originality or dont want to change them all to match.
I would at least replace a pair of them with the larger plates, or all 4 if thats your thing.