obsolete "compression nut" - source suggestions?

[bandersesk]

Hello,

I cracked a Sta-Rite sand filter compression fitting. Apparently obsolete. Any suggestions? Pics attached. Key 8E, WC36-17P.

 

[Casey]

 

[gtemkin]

If you can post a picture of the cracked ring, I can possibly propose a repair. Is it a single crack that goes straight from interior to exterior or is it totally shattered? Because if its a single clean crack you can try putting a large stainless steel hose clamp on it's outer diameter Which will prevent it from opening up while tightening the union.

G