Oh dear God! 318 stroker

Hello I'm new here and this might be the end of me for even bringing this up but...... after a long search on the web I have not found what I'm looking for. I have a LA 318 that is sentimental to me so it is what it is. I am looking to stroke it 340-349 Cid. No more no less. I see a lot of stroker kits to get 390 but it's not what I'm looking for. I understand that this is a dumb thing to hash through but any help would be much appreciated!
I have a (?yellow steel?) forged 3.51 crankshaft, but you would have to order custom pistons-it should put you into the 340 cubic range sir.