Thanks to Tuberose's post re this subject, I too have recently had several rings re-modeled by Audrey and her team at Bali Gold Jewellery. Their shop is located in the lobby of the Kuta Paradiso Hotel on Jl Kartika Plaza, so it was convenient for me as I was staying at the nearby Dynasty Hotel.
From my 4 rings, I had one re-modeled into a pendant using the existing garnets and diamonds. I was pleased about this, as the ring had sentimental value to me, but I had lost one of the large garnets. Here in Perth, I was quoted a price in excess of the original ring price to replace just the one stone!
I did not have any particular design in mind for the second item, but chose a ring style from her range of books. This design had a mix of square and round diamonds on it, and although I had no square ones in my other rings, they have cleverly made it appear that some of them actually are.
The gold which was left over, was returned to me as a small nugget, which I can re-use at a later date.
I was able to negotiate an excellent price, especially compared to Australian quotes, and I found both Audrey and Sunniti to bevery helpful and friendly. I am delighted with both pieces, and will certainly be using Audrey again.