Dwarf mulbery in the UK?

Does anyone know where you can get a Dward mulbery in the UK? Would look to grow a mulbery, but dont have room for a full size one.

I can find them Brisbane! http://www.daleysfruit.com.au/fruit%20pages/Dwarf-Mulberry-Black.htm
MULBERRY - DWARF BLACK, Morus nigra
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and Morus 'Geraldi Dwarf' in the US.