Wrong forum Draughtproofing - companies in Dublin

Can anyone recommend a contractor/company who can advise on (and carry out) draughtproofing? I have serious gaps around my old doors - both the front door and internal doors - all of which are over 100yrs and showing it! I've tried those adhesive strips, the letter box has a brush cover, etc, but I really need someone who knows what they are doing (perhaos just a really competent handyman) to properly assess it. Im losing buckets of heat, despite having new windows all over the house, a fully insulated attic and fairly new gas boiler.

Dublin CC here.

Thanks