For anybody out there following this thread, I was finally able to obtain the unobtainable Beretta PX4 Assembled Safety Lever Type "92FS R.P."
Sadly, many Bothans died to bring it to me.
These things are dang near impossible to get at all yet alone in Canada. They're always sold out on Beretta's site but you can sign up to be notified when they become available, which took me 3 attempts and a couple months between them to finally get one on order. They literally sell out within minutes of getting the notification email. Makes me wonder if they only make one at a time.
Anyway, I am very happy with it.
It protrudes slightly further out than the OEM levers, maybe 1/16" or so, so between that and the shape of the levers themselves they are far easier to disengage. I can flick it off with the knuckle on my thumb like I can with my 92fs albeit not quite as easily as with the 92 due to the slight difference in relative position to the grip. But after months of practicing with the stiff and difficult to manipulate OEM levers these ones feel God sent.
I still haven't gotten around to upgrading the sights, although a site sponsor now carries the Truglo TFX sights I was after, but I did touch up the front sight with a drop of white primer paint and topped it with a drop of neon orange nail Polish from the neighbor. I can't get over how effective it is, might have to do the rear in green maybe.
Anyway, this was my favorite shooter before and now it's just about perfect!