Engraving

Does anyone know of a place in Bangkok or the suburbs where I can get a brass plaque engraved?

All the shops that put the credits on cups and trophies tell me that they use lasers and make a new plaque each year to go on the trophy with the new winner's name added to all the previous names.

I can't do that as the sailing trophy I have for the last two years has a solid brass plate which has been engraved several times using the old fashioned method.

Any advice would be much appreciated.