how could i make a recype to give me fluid suply instead of water?

In default, the Infinite Fluid Supplier is not craftable. JEI will show a recipe for the block, but it is for Infinite Water Supplier.

Infinite Fluid Supplier is now creative-only block unless you add your own recipe. Here is an example recipe definition. You need to add this recipe into your environment if you want to make Infinite Fluid Supplier craftable. Don't ask me how to add recipe, because there are a lot of material for this kind of question.

{
  "type": "minecraft:crafting_shaped",
  "category": "misc",
  "key": {
    "I": {
      "tag": "forge:storage_blocks/iron"
    },
    "d": {
      "item": "minecraft:diamond"
    },
    "g": {
      "tag": "forge:ingots/gold"
    },
    "i": {
      "tag": "forge:ingots/iron"
    },
    "w": {
      "item": "minecraft:water_bucket"
    }
  },
  "pattern": [
    "wiw",
    "gIg",
    "wdw"
  ],
  "result": {
    "item": "fluidtank:fluid_source",
    "nbt": {
      "unlocked": true
    }
  }
}