Yes, backers of the kickstarter will receive theirs soon.
The plan is however that amigastore.eu will act as the future distributor of new cases.
The special edition cases will be unique and not produced again.
However, there might be one or two more special editions becoming available in 2017, again, through amigastore.eu.
One more thing .. if you join the new keycaps campaign
https://www.kickstarter.com/projects/a1200housing/new-compatible-keycaps-for-amiga-computers you will have access to a dark grey (CD32 color) case becoming available in 2017 also. This color again will only be available for backers of the new keycaps campaign.