I had a look on Christies website
http://www.christies.com/ If you go to the magnifying link at the top of the page you can search current lots but there is also a link to past lots. I put in Balinese textiles and I did get some returns with prices. I think they make a practice of keeping results of auctions on their website to encourage future sellers. Christies does offer textile sales now and then.
I would think that auction houses in the Netherlands would have sold a considerable number of Indonesian textiles. Sadly I don't know the names of any nor if they keep info available to be accessed. Perhaps some of our other members can help you. Just doing a Google search might help. I did 'Dutch auction houses Indonesian textiles' and got some returns including Bonhams Amsterdam which had some textiles with prices from past sales.
Good luck!
_________________
Pamela
http://www.tribaltextiles.infoon-line tribal textiles resource