I sell them to zcar.com users for 143.46 + shipping to you. I'm not aware of any other cars that use this style of fuel reg. You might be able to find one that has 3 fittings and back yard it on but I'm not aware of any. You're going to have to bite the bullet and pay the price. It was worse a few years ago, I sold them for 175.00 each to zcar.com users if I could find one. At least half the time I checked with all my vendors they were on back order. That period lasted at least a couple of years. They still go on back order once in awhile but it doesn't last. Z man of Washington
The one in your pic is a 2 outlet regulator and your car takes a 3 outlet unit. 2 outlet won't work.
mailnom, to correct you the Maxima from 79-84 pressure reg is the same as all z's from 78-83. I don't remember for sure whether the 78 Maxima is the same or not but it probably is. I don't work on many 810 or Maximas anymore. Most of them have been crushed. ZMOW