Anybody own an FX Elite 500 or know how to contact Johnny Sweden

Thanks for responding.
I'm the owner of a unique Elit 500 that was used in the EBR prior the initial appearance of the Boss.
Apparently, someone (a prior owner-?) enlarged the transfer port and I'd like to find the correct diameter of the port, as it came from FX.
If anyone has an Elite 500 (.25), all you have to do is pull back the bolt and measure the transfer port as it's exposed when the bolt is in the pull-back position.
Any helpis appreciated,
Saludos,