A good mate of mine specialises in grey imports from Japan into Australia. Recently our Federal Government was considering relaxing the rules on these and my mate was investigating various options for importing mainstream units from Europe and elsewhere. He did some sums and to cut a long story short to convert a car from left to right hand drive costs around 80 to 90% of the new price to perform - minimum.
Even though many left hand drive versions of regular cars are sold as right hand drive in other countries (like our CX-3s for example) it is as Anchorman points out, the sheer scale of the undertaking. Sourcing the replacement dashboard, complete wiring loom, steering rack, steering column, and various other interior bits and pieces costs a fortune even though they are regular parts from the manufacturer. This is not to mention exterior bits such as wipers and lights. Plus the certification costs from the local DMV, plus the import charges for all of the one off bits that someone such as a dealer would need to import. Good initial thought but unfortunately just too complex and costly.
Best option would be to sell your CX-3 in Europe and buy a replacement vehicle in Ireland.
Good Grammar is not a time of waste.