I have a couple of researchers in Lithuania that I met when I was this this past May.
I would suggest you exhaust all the resources here in the U.S. first before engaging someone in Lithuania. The more info you can give them, the faster and cheaper will be their efforts.
The sister one John Moliusis is still alive. I need to contact her to see what she might know about the family members in Lithuana.
How you found the arrival info for John? How about his marriage info in Schuylkill County PA?
Tom S.