I have no idea if there is a tackle and bait shop in Youghal itself but try
http://www.cfb.ie/fishing_in_ireland/ta ... s/cork.htm
Nearest ones are in Fermoy and Cork city...
Failing this there is John O'Briens next to Woodies DIY in Waterford City, he can even arrange gfresh lugworms if you give him a call on 051 844314; another tackle shop opposite the car park on New Street in Waterford City (051) 857554, and Baumanns Jewellers on Mary Street in Dungarvan on (058) 41395 which has a tackle section at the back...
FWIW...