If it's brass sounds you are after, then I would suggest the Yamaha DX7 ROM VRC-102 and the ADP-1 cartridge adaptor: -

Yamaha DX7 ROM VRC-102 £15
ADP-1 Cartridge adaptor £10
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£25

I am in England.

If you are still interested send me an E-mail on dwmusic@dwmusic.f9.co.uk