Thanks to Jim Harmon at Harmon Racing Cells in Corona, California for a great job custom building an FIA certified fuel bladder and enclosure for my RF-84. Perfect fit, great service, and reasonable price. I would recommend him for custom fuel cells.
The RF-84 cell is a triangle when viewed from above, has elliptical sides and sits behind the driver, just ahead of the radiator. I traced the footprint, provided basic dimensions and Jim did the rest.
Jim@harmonracingcells.com