Where can I get door hinges for a 1970 240Z?

Well, if you can't get a set off a car someone is parting out you can get new ones from Motorsport Auto. They are a bit expensive, about 50.00 to 60.00 dollars each, each of them is a different price upper and lower (don't know why the big price difference). They list the same part number for 70-75.

Any hinge from 70 to at least 75 should work although the series one cars had a different hinge (hold open detent) so all I can say is good luck. Check thru the For Sale forum here, you may find a set on a car that is being parted out.

Before you buy new from MSA, why not check some of the on-line Z parts folks for used ones? A couple who come to mind are the Z Barn in Tennessee (www.zbarn.com) and Eric Nierling in Pt. Richmond, CA (www.zparts.com). There are others as well if yo search around.