Nibco Anti-Sipon Replacement?

The "inline" anti-siphon component of my nibco outside water spigot needs to be replaced - or it needs new "insides". I cannot seem to find evidence that it ever existed, however.

It attaches to the spigot with fine threads (probably about a 1" "female" opening) and has regular hose threads on the "male" end. The inside gasket is worn out and a brass piece that covers the gasket is bent and broken.

The fitting has the following identification markings on it - "NIBCO-VBS-12-AASE 1011-UPC". Does anybody know where I can find replacement parts?

Thanks,

Nibco

Might be cheaper and easer to replace it.........

Replacement will be expensive

The valve is "frost free" and the basement is finished. Replacement will require a few holes in the walls and ceiling - and the requisite re-finishing afterwards.

I'd like to try other options first...

Nibco

Make an access? You may need one again....
Does it leak? Do you need it to be anti-siphon?