Saving Old Seagulls

I am remanufacturing some Marston fuel tanks & need the bayonet fuel cap type necks, this is the only part that we can't recreate so if you have a really battered tank (steel or brass) with a good filler neck, I want it!
I have several good tanks but am loath to destroy a tank with only a few small dinks just to get the neck.

Please don't throw them away, even if they are rusted to bits.

I want to recycle them.

Many thanks

Charles UK

PM me with a telephone number & I'll call you.

I have discovered that the factory in India that manufactures Royal Enfield motor cycles now manufactures reproduction tanks for British Bikes - some of them with bayonet fitting caps.

That means that someone over there is making the bayonet fitting forgings, maybe a contact can be made that would provide a few?