Hi all, I had the same question and after some digging around found some info on this that might help. If any of the info is incorrect, please correct me.
The EJ-DE and EJ-VE valve cover + coil packs are the same matching numbers).
So the coil/spark plug tube seals are the same: Toyota Daihatsu part# 90044-80571
Can be bought at Amayama online or at the dealer (I suppose) .
Replacing them looks/is somewhat of a hack job, but do it delicately and I think it will be fine.
The guys in Asia show us how it can be done on YT - don’t try to translate, just feel the Force!
Models with the EJ engine over yonder: Perodua Kelisa, Kenari, Kancil
You might find more interesting parts for your own AUS or EU models.
Disclaimer: haven’t tried it myself yet.