Repair tilt and turn double glazed window

Skint_yet_Again

I have an old tilt and turn UPVC window in one of my bedrooms - it was in place when we bought the property in 1998.

When the window mechanism is turned to tilt a metal "bar" comes down in the right hand opening corner to stop it opening fully. I don't know much about windows, so I don't know if all tilt and turn windows work like this or if these types of mechanisms have been changed/ modernised since 1998.

Anyway, the end of the metal bar has snapped off and now it will not tilt or lock open in tilted position - it will only lock closed or open fully.

Is there any way to repair this or will I have to replace the whole window ?

I would be grateful for any advice