Good morning, NZ
I found a few patterns that might help you re-create your coat.
Two of them are Simplicity Project runway out-of-print ones.
First, the girl’s coat pattern that reminded me of your coat:
Simplicity 2534 which goes up to Girls size 14, and
Simplicity 2508 which has a super collar
Use this link to get to Simplicity Creative which carries OOP patterns – and brings up 2508;
http://www.simplicity.com/p-3064-misses-jackets.aspx
Vogue has one pattern – V9157:
http://voguepatterns.mccall.com/v9157-products-50716.php?page_id=174
and Butterick, too, has one – B6141, that might help:
http://butterick.mccall.com/b6141-products-49148.php
Losing a favourite article of clothing can be like losing an old friend – good luck!
Marlene