Where do I get inserts for fallen arches?

Can people pm me or say where they went for the cast method? I would really like to get a new pair and that's the only method I would go for.
 
I got my orthotics from the chiropodist in Clerys department store in Dublin. The chiropodist casted my feet and sent the casts away to get the orthotics made. I have had them about 10 years now and no problems since,