Finally found the catalog filed under Racor. These folks were at a few of the trawlerfest. Try
Diesel Fuel Polishing Systems | Racor Dual Filter System | FilterBoss 800 336 0315. Andy Keenan Southwick, Ma. He makes 1/4" and 3/8" in 2,3 and 4 Valve blocks. They do aircraft work also so their specs. are tight. He will do custom work also. The units made of steel tubing can fail at the welds. The solid blocks are more reliable. Good luck with your project. Suggest Parker fuel lines for long life and ease of making runs.