Keg Lid Relief Valve...Source?

Systems, Gear, & DIY
1

Awhile back someone had posted a source for keg lid relief valves that were fairly inexpensive, i.e., ~$5.

2

These? http://stores.kegconnection.com/Detail.bok?no=239
There might have been others.
There are 2 older styles, but these new ones should work for both.
The black ones fit one type (depends on the number of holes in the side of the stainless fitting) and grey the other.

3

Thanks.