I do not know what you need, but I have downloaded from the address you gave up because I come from Vietnam. I'm not sure my job is good for you, but I'll attach it here http://www.mediafire.com/?ifrxqeos63qwras
sorry if my job is useless and stupid!
this - GT-S8500B AnyService Manual 100601
and this - GT-S8500 SVCM final Anyservice 100429
this is contacts
Hanoi: EGSM - SMART ZONE 11 Le Dai Hanh, Hai Ba Trung district.
Tel: (04) .9131420 - 0904.994889 - 0913.348533
Ho Chi Minh: DELTAS SERVICE CENTRE - 29 Ly Thai To St., Ho Chi Minh.
Tel: (08) .8302026 - 8302027, +84903663388 (Mr Rang).
need to call and ask about the site and files.