i see that you are in the need of a sony mbt xbr900 media box, well you can buy one directly from sony for about 408 dollars plus shipping and tax. my box was dropped and severly damaged i am just passing this info on so you can get one also, they have them in stock....
MBTXBR900 T99861148 $408.00 plus shipping
http://servicesales.sel.sony.com/web/index.jsp
800-488-7669
the first number set is the model the second is the part number and third is the price, if you search for the part on their site enter it as mbtxbr900 and thats it, very easy and not all that expensive. hope this helps you out
good luck
walter b
