Can you post a clear photo of the area, and the break? It may be possible to drill the parts, and 'pin' using a piece of wire from a paperclip.
If you contact Airfix, with the kit name and number, and part number, you should be able to get a replacement part, although fitting it might be a problem.
This kit is basically from the same moulds as the original Mk1 kit, first released around 1970, which probably explains some of the problems with fit of parts. I built their Bf109E a few years back, from the same era, and some of the parts were so 'softly' moulded, I decided to build it 'wheels up', as a belly-landed example, as the gear legs were virtually unusable !