Big seven specific parts help!

[MidlandsAustiner]

Have you got all the bits of the manifold
If you have you can braze it.back together
Or biuld up with weld and file back to shape?

I have and I will try brazing it but I was wondering if anyone knew anywhere to get a replacement as my ford Anglia had an old patch on the exhaust manifold and upon going through a puddle the engine suddenly got VERY loud (the repair metal had popped out due to rapid cooling of the metal) so im weary of it.

Thanks!