Looking for a good quality Petcock for my bike

[Diggy]

I have a LF200GY-2 bike and I use it for Pure Dirt most of the time.
Anyone know what else I can get for a good Petcock for the bike.
This is what my Petcock looks like right now.

http://www.hooperimports.com/product...f_id=DSPetcock

It shows the measurements down below, but this one does not have the two screws for changing the rubber seal in it.

Im curious if there is anything else out there that will work for the bike, or do I have to get the exact same Petcock for it..

Thanks

Kevin