I don't know whether anyone has successfully imported an ERA kit, since Transport Canada started clamping down a few years ago. ERA's kits tend to be fairly complete, which might be a problem vis-a-vis TC and Canada Customs. Maybe Bob from ERA, or another owner could chime in here.
The subject of importing Cobra kits into Canada has been covered extensively on this forum. You should do a few searches and read up on what you find.
Here's one to get you started.
Ultimately if you want to import an ERA kit, you're going to have to figure out how to ensure that enough parts are excluded/unattached so that TC/Customs do not consider it an "unassembled motor vehicle" at the time of importation. This is the key.
A lot of guys have imported Factory Five kits into Canada, so you might want to connect with them to see what can/cannot be included in your shipment.