Hi! My top 3 have been already mentioned. Here are 2 more:
1) www.thequiltshow.com There is a lot of information on the Daily Blog and the Quilt Gallery without becoming a paid member. A paid membership gives you access to the shows with Alex Anderson, Ricky Tims and guests who are well known in the quilting world.
2). www.quiltshops.com On this site, you can search for fabric and supplies from over 200 quilt shops. I didn't research each shop as the whether or not they will ship to Ireland. I use this site frequently when I'm looking for something specific, ie. red paisley.