The 240 has the only rear hatch strut that i've seen that you can't buy aftermarket in a typical auto parts store....the best place is to order one from Motorsport Auto-I can't remember the number off of the top of my head-I think it's 1-800-633-6331...it'll cost you about 100 bucks but well worth it.
the 240Z struts are hard to come by for some reason. ive tried several different struts from other cars and think ive found the perfect one. i offer these in kit form, the kit comes with a new strut, a alum spacer, and the needed bolts nuts and nylon washers. price is 35 + 5 shipping. if your interested drop me a line.
I know a lot of people have doubts about e-Bay but I've not had any bad experiences. Sean240z who is auctioning this item is a good guy. I've bought several articles from him, and he's always been straight and honest.
I have a workign hatch strut off of a 73. I tried to sell it on ebay but the guy turned out to be a deadbeat. Didn't pay the shipping cost. This strut worked well on the car. Held up the hatch just fine. Let me know if anybody wants it. Thanks.