agree, Facebook may be a good place to start.
Or when the libraries open Abergele Library could put you in touch with a local history group. A letter in the local paper may help - Abergele library could advise re address of local paper.
Could you access old Abergele Primary School Admission Register - this would give the address you're searching for.
Of course there's a possibility that whilst the Liverpool train would have brought them to Abergele Station they could have ended up in one of the surrounding villages.
Best bet would be a letter in the paper and make reference to the farmer's disability.