There are some unlocking services (data cable only) that you can try to use.
DM3 won't work for that model but there are different services more in use on the shops and not so advertise on the web... it's worth to visit you local phone shops to see if it can be released.
I do the work remotly. Supported models: 9380,9790,9370,9360,9350,9800,9810,9860,9900,9780. 9700.9000.9300.8520.8900.8910,9100,9105,9630,9500, 9530,9520,9550,8220.
More info just add me to bbm pin: 287BD608 msn:[email protected] aim:zeromepleft