Hello Martin, records for Sobrance are really now in state archives of Transcarpathia, in Uzhgorod. If I saw your post earlier, I coud send this information to you.
So yes, they have Jewish records for Sobrance starting from 1845, I have books and years. Also I can check situation for other villages. This everything is free of charge of course, just email me.
Also, in spite of reputation of Uzhgorod archives as closed institution, this information can be gotten from, no doubts. One big US genealogic agancy has access to and plus I could help you with some good advice about.