Plating and Plating Companies

hello all i have designed a hollow piece in silver, part of which i
would like to have goldplated, in particulr the inside, which is
visible through some holes in the design. as soon as i dont usually use plating i wouldnt really want to invest in any epuipment. i
have asked a local plating company for a quote but was slightly
surprised at how much they were asking. does anybody out there have
any ideas on alternative ways of getting gold on a silver surface?
or maybe even an address of a plating company you could recommend?
or any other idea??? many thanks and looking forward to your replies