Laser line key fob

Hi guys

I have a laser line T101 key fob and the plastic ring has snapped off. Last time this happened to me I bought one of eBay for like 10 pounds.


However, I can no longer find it on eBay, and the only company seems to be selling it for almost 40 pounds.

https://www.bridgwater-electronics.co.uk/laserline-range/c21

Anyone have any ideas how I can salvage it? I have a little bit off plastic sticking out…..

Thanks