Does anybody know where to get engraving done in Tokyo.
I have tried a jeweller but he was charging Y300 per letter and was going to hand stamp each one.
I just want to find a man with a machine that can complete it in a short space of time.
Any area OK as I am getting desparate!

Did you try Tokyu Hands?
But, even a man with a machine would charge something like 300 yen/letter (in Tokyo).

note from Admin: Tokyu Hands website (in Japanese)
http://www.tokyu-hands.co.jp/

Depending on the surface to be engraved, you might try a sign shop or even a hanko shop. I imagine that there might be some hesitation engraving romaji vs. engraving kanji and katakana/hiragana. This sort of thing would take some time to nail down. If there are a lot of letters in what you want engraved, then maybe try to bargain. OF course being in a hurry puts you at distinct disadvantage.

Often the shop where you bought the item, if it is jewelry, will do engraving at a reasonable price given that you are their customer.

I had a ring engraved in Shibuya for just a few hundred yen a couple of years ago.

If you take the Hachiko exit and cross the main intersection diagonally you'll hit the street with Sakura Camera (is this Center Gai??). Anyway, on the opposite side of the street from Sakura camera there's a street-level shop that sells silver jewelry (and leather belts, feathered keychains, etc.). In there they have an engraving pen and will engrave anything BUT they do it 'freehand' without a template and it's definitely not as nice as a machine would do. If this is a nice item that you want engraved then I might avoid it. But it's cheap and quick and does the trick if you're in a hurry.