Internal window sill suppliers in Dublin

Hi All,

I've put some insulation on a wall that has a window and it looks like the old internal window sill is now a bit small (the plasterboard edge is not covered by it).
I googled around for a while and found a company in Dun Laoghaire (Ecotech Windows) that have internal window sills advertised separately. Was just wondering if there are any other companies in Dublin (South preferably) that sell window sills separately. Could you maybe suggest a company or two that provide reasonable quality for a person on a budget?
PVC ones are fine by me but I would prefer wood (just finding it easier to work with).

Thanks,
H.