MG TF window zip broken - help!

[Jaguar steve]

Rear window zip refusing to zip together leaving the top of the window flapping loose. Tried all I can think of to get the zip to work but into getting anywhere.

Anybody suggest how to fix, maybe someone to repair and fit a new zip or just get it sewn together?
Rest of the hood is perfect so don't want to replace it unless I have too.

Cheers chaps

[na]

other than clean and lubricate it's a tape a patch over until you can sort