Blowoff/Popoff Valve:

Hi, could you help me to identify this valve?
I bought and used popoff valve, with a missing horn, and wish to know who is the manufacturer and model of it, the picture:

http://img100.imageshack.us/im...3.jpg

http://img413.imageshack.us/im...3.jpg

I want to buy the missing horn, that fix on the 3 screw holes, and my friend want to buy another valve like mine.

Thanks!

 

Is there any markings at all on it? Numbers or something? If you find a number you could google it and see what shows up.

 

Nor markings or numbers, but someone at HT could already used it and can tell me looking the pictures...
It works very weel, this is the reason that I want the Horn and know where I can buy another one to my friend...

 

No one knows this valve?