Off of Terra Firma web site ( https://tfaspeed.com/ ) But i"m on the other side of the pond.... so not sure if this is less expensive than local (with the shipping and all ) for you guys. But for me this was the cheapest on the Net. Here, the Nissan dealerships are Oblivious to these cars and unless you get somebody who realy knows about cars, you will not get much out f them.
The option of re-gassing the thing made me cringe a bit. No valve or anything on it. There is a nipple on the top of the cup but it would of had to drilled, tapped etc. etc. On the BNR32, I wouldn't of wanted to either change the pump because of a shaddy accumulator and/or do this heck of a job again anytime soon.
- I used a strap with a 1/2 inch socket to get it unscrewed (4th picture), but had a surprise when I realized that the accumulator is in two parts. The other part that you see on the 2nd picture had to be knocked out hard to get it unscrewed. I had a friend to hold a pry-bar and made a notch on the piece to get it to unscrew