There's a PDF scan here of an article about them:
https://issuu.com/mtaye/docs/the_lon...irey_fireflies and discusses the remaining ones at Asmara. I'm still searching for remains/news on the fate of the EtAF's last two Canberras. Been on Google Earth/maps loads of times hunting around Debre Zeit and Dire Dawa but no sign of them. I've had it confirmed they were not part of the 1996 South African purchase, so unless another foreign buyer got them, they might still be there.