Patio door - replacing the lock mechanism

[toxicated]

I have a sliding patio door that's about 15 years old. The doors themselves are fine but the locking mechanism is broken - the mechanism slides about three quarters of the way but doesn't fully engage.

Had somebody out to look at it and his verdict was... replace the doors.

There's no identifying marks on the doors to track down spares but the best part of a grand just for a lock failure seems a little steep. Are locking mechanisms fairly generic or is it a case that if I can't find the spares I need a new door?

Thanks

[Blakeatron]

What kind of doors? Plastic,wood - pics?

Most brands use specific sizes so spares / replacements are hard to find.

maybe take the lock out and check for marks

[jas xjr]

might be worth taking it all apart and just cleaning / oiling and putting back together

[toxicated]

I've taken a couple of pics. The problem is that the locking mechanism isn't moving up high enough to allow the lock to rotate.

How it is:


And how it should be:


I'll take it off over the weekend and break it completely / try to fix it unless somebody has any suggestions before!

[ColinM50]

Take the mechanism into your local window builder, every town's got one, and ask them for a new one. Shouldn't be much more than a tenner. If you're really cheeky, go in there late afternoon when the lads are all coming back in their vans and have a chat with one of the fitters and drop him £20 to come round and fix it. But don't try this with "the big boys" Everest or Anglian, they're all banned from doing this type of foreigner job, but a local company should help.

You could also try the sob story, "I want to change the doors next year when I can afford it, but in the meantime can you help me bodge this up mate"