Tuning Replacement burst/rupture disc for Nova Vista Freedom

I don't know how this happened, but I blew the 4500psi rupture disc on one of my Nova Vista Freedoms.

Apparently, the pressure gauge on the Freedom was stuck and I did not realize it. The strange thing is that I was pumping it up with an external hand pump (because the onboard pump was not working) and THAT gauge never made it to 3000psi, which is as high as I ever pump up the Freedoms. I am baffled why the 4500psi disc blew...

BTW, using the same hand pump, I have pumped up a Fortitude since this happened and the gauge on the hand pump worked fine. Go figure...

Anyway, can anyone tell me where I can find a replacement burst/rupture disc?

Thanks in advance!

Kerry
 
q&a on aspen on PA says you can get one from them or air venturi. 

maybe ATI or Air Venturi could also help you out?

this is assuming that message is not so old they no longer carry parts:

https://www.pyramydair.com/customer-discussions/m/Seneca_Aspen_PCP_Air_Rifle/4715

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