Instax Wide 300 Lens cover broken, not shutting properly

[PianoMan343]

A few months ago I purchased an Instax Wide 300 off eBay, it has been a great camera and I've had lots of fun using it. A few weeks ago the lens cover stopped closing properly, the top half is permanently retracted and when the camera is on the bottom half doesn't fully retract. While this does create an interesting effect on any photos in direct sunlight I would like to fix it if at all possible. I have been unable to find any information online about how to fix it and wondered if anyone on here had any experience with the same or a similar problem. Photos attached for reference.

 

[cgw]

Fujifilm service or a new camera. Not much scope for DIY Instax repair.