Time for a sandgroper update:
Confirming 148, 256 and 266 are licenced and cruising the streets of Perth, Western Australia. 10 and 173 are currently being restored.
I see you already have 47, 63, 87, 90, 235, 287 and 293 on the list.
There's also two more genuine Cobras but I haven't managed to grab their numbers yet:
45 was sold in May 2015 and has moved East. 54 was listed for sale for most of 2014 so may have also moved East. I haven't seen 94 for a while but it was listed for sale in Jan 2014 on Gumtree. 83 was in Perth at the All Ford Day in 2013 but hasn't been seen since. 164 was also listed for sale in May 2015, current whereabouts unknown.
There's still a few unknown numbered Cobras on the radar but there's at least another three original Cobras in the West!
So 17's not a bad count for genuine Cobras residing in the WA.