Secateur Spares ?

I have a pair off Gardena BP50 Secateurs . I dropped them and the orange plastic slide lock - the little orange thing in the photo - has broken off . So I can't lock them shut. These are lovely secateurs which will not lock closed now . Is it possible to buy spares for them ? My googling has been fruitless.

 

Some one else may have a pair they don't use

Done a bit of googling, i don't know any thing about the company, but they do spares
https://www.google.co.uk/url?sa=t&r...0.html&usg=AFQjCNGHBhy55CPuleOp0BH_t6uwsu5ypQ

 

Rubber band?

 

Thanks Jiffy , Zigs and WOO
I'll give Gardena a ring this week , and try and describe a little orange sliding twiddly bit ! I don't hold out much hope for a 2 pence spare. Going off zigs idea , I may try and make a latch out of wire