Just spotted an early 1970 240z for sale here in Ireland. I've never seen or even heard about this car before but looks to be in good shape from the pics.
Fully restored Datsun 240z For Sale in Dublin : €18,000 - DoneDeal.ie
I'm afraid there are no irish parts suppliers, the nearest would be mike in MJP in the UK.
I got wheels from image in the UK also, they will pretty much make whatever size offset you want.
What's your plans for it? Colour etc? I don't want a twin :p