i checked your website out and after staring for a few minutes, i realized something. can't read a single thing.
anyway, my huess is you are either IN malaysia or thailand.
the shimano manufacturer is in state of Johor the south most state in msia, right before singapore.
whether you can go there or not? i don't know. there are a few bike shops around, very few.
shops in penang, ipoh, kuala lumpur and perhaps johor bahru and im quite sure no where else.
but you can always go to singapore for parts if you have no luck in malaysia.
where are you? let me know will ya, pm me or something. im in vietnam, hitting thailand border in a week or so i think. maybe 9 days.