O.k then we won`t bother with part suppliers .
In any case at this point all that can be found is some used boards on ebay.
For a Sony ASC (authorized service center) click on the link below and enter your TV's model and zip code ;
This will give you the ASC`s closest to you.
At this point I could say that you can expect a repair of approx. 200 to $250 .
If there are several sony shop near you then I would call different ones with the info you have now (t-con) , to get an idea of their rates , this may vary from one shop to the other as this tv is no longer under warranty.
Wish i had better news and an easier solution for you today but i hope this help and I will be in standby if you have any questions.
Thank you and please take the time to rate my answer if that answers your question and you can still reach me here at anytime after this chat is closed if you have other questions.
Please note that from where i`m sitting there is just so much that i can do and if you are going to rate my answer below O.K service then please do not rate at all , just let me know.