Hello April! Welcome from Florence. Wausau or Rhinelander may be your best bets for finding a service tech. SewSmart has a fabric store in each, at Wausau she also sells vintage machines, tho I do not know if she repairs. May be worth a phone call, a recommendation if nothing else.
I've never worked on a FW, or a machine with similar issue, or I'd be glad to help.
Lori