The Jumpgate Controller should be craftable at the Metalworking Station, in the ingredients tab. If it isn't there, let me know!

What do you mean by Metalworking Station?

It's the final crafting table available to Avikan and Droden characters, you can craft it at the Avikan Artisan's Table (which is the upgraded version of the Avikan Workman's Table. If you're not playing as an Avikan or Droden, you can purchase a Crafting Guide to unlock the crafting recipes, or you can simply buy a Jumpgate Controller from the Drifter's Emporium.

Thanks my dude you rock