I've seen one but wondering how many are out there.
A lot, probably.Most that I see already have a specific bitcoin amount on them. I'm looking for something that is more like a physical wallet made out of a coin so I can put any amount on it without having to match the amount on the coin (i know this isn't actually required).
The recently sold out silver wallets would fit that description (to only name one candidate), I'm sure you can find one on the aftermarket (aka here 
).The Ravenbit DIY has no face value either (again, sold out, gotta find one on the aftermarket).