Available here;
http://www.partsamerica.com/ProductList.aspx?parttype=193&ptset=A&searchfor=
Distributor+Rotor+Button

Perhaps an American friend can get you one and ship it.  Obviously
'discontinued' merely means your local parts house no longer carries it.

I'm assuming the Infiniti G20 is the same vehicle because Wikipedia told me
so.
http://en.wikipedia.org/wiki/Nissan_Primera

--
TFM®
Zephyrhills (On the corner of Crack & Junkie) Florida