Tamper-evident keg caps?

[Woolsocks]

Anyone have a source for keg caps where you can tell if the keg has been tapped? Basically I'm looking for a plastic cap that you have to break to tap the keg.

[matt]

I thought all kegs caps were "tamper proof"!?
That's why we put them on isn't it?

[Woolsocks]

I dunno. I can take a cap off and then put it back on and you can't tell it was ever off. Where do you get yours? That's what I'm looking for.

[rudge75]

I get mine from Kegclub.com.

You have to rip the tab to open the keg, and the cap is harder than the simple dust covers, so it's obvious if someone tried to remove and replace it.

[brewmaster 2011]

I believe BSG sells tamper proof keg caps.