Hello!  I took a look at the manuals for the X51 and it doesn't appear that there are any motherboard layouts in them from what I could see.  I also have not heard of anyone modding an X51 in that manner to accept a normal PSU.  Have you tried Amazon or Ebay at all?  I found this in a quick search.  Granted its for US but you may find someone shipping internationally, or there may be an Indonesian site.