If you are in Ireland (the larger part) then it has to
https://ie.farnell.com/
Free courier delivery but make sure you add your Eircode to the delivery instructions as your Eircode will not be recognised and will be deleted from your address. The courier will not find you without an Eircode address. Farnell is building an Ireland (the larger part) specific department, which will ensure that the Eircode is recognised in future.
On the off-chance I can't get what I want then it's eBay for UK suppliers via an AddressPal UK virtual address to reduce postal cost.
Ireland (the larger part) has no decent suppliers of anything and if we did have any they would charge double UK prices and An Post would further kick us in the teeth with extortionate postal charges.