Exhaust seal ring?

[Hicksi]

Hey,
I noticed the notch for a seal on the exhaust manifold on my '01 EC300.

Does anyone UK side know where to purchase these seals as i really need one?
Is it possible to use one from another bike? Say if i went down to my local KTM dealer and bought one for the 250exc or 320exc?

Thanks guys

 

[eff]

You can buy them in bulk from an o-ring supplier. 44mm x 3mm Buna N. Viton is better but more $$. (http://www.gasgasrider.org/forum/showpost.php?p=7682&postcount=2)