I just bought a rabbit coat on ebay inorder to get the fur. I put a fur collar on a knit shrug that my 8 yr old GD had. It had come with a fake fur collar that was ruined by washing. The new collar looks really great and she loves it. It only took part of one sleeve. I think I may make her a vest from the coat also.
You might trim a hat and gloves to match with your collar.