Traditionally, native people in this area made rattan strip with knife like this...
But, if you try local furniture makers, you may find one at reasonable size... like this
http://www.marshallmcgurk.com/SitUpon/diysales.htm
You can follow Turk Head technique. These pictures may also help.
http://www.thaiblades.com/forums/sho...CB%C7%D2%C2%2A
http://www.thaiblades.com/forums/sho...A1%CA%D2%C1%2A
http://www.thaiblades.com/forums/sho...CB%C7%D2%C2%2A
In one of those link. You may notice a metal can with holes. That 's a special tool for making very very thin strips. Dont forget to soak the strips and trim their nodes before passing through the hole(s).