@DingerCPA I just noticed a picture in the same thread that I found the post saying that those cores fit the ECR. Not sure if it may help you or not.
"I have been using the 0.5 for one week and the 0.9 for two weeks & there good. The ceramic is not bad in these. Much better compered to these Vaporesso cells where the ceramic tuns to mosh after a few weeks.
All you have to is lightly wrap around some cotton around the out side (not much) as to hold it in place & to stop any leaking.
The best RBA system for this is Eleaf
SKU 4563200 as its a perfect fit & is so easy to build!"
Here is the picture-
Bust out your Ijust 2 tank & blow of the dust (0.9 Ceramic have more flavour than 0.5 Ceramic)
from post 20 and 21 here
FastTech Staff: Metal Wire Type: FastTech Forums
That is good news, Bov. I sure hope that the vet is correct and he is back to his old self in no time