Where to find the spacer armor for the outer worlds mission make space suits, wont travel mission. This is part of the quest which will reward you with one of the best armors in game called Chimaera.
How To Get The Spacer Armor
The spacer armor is tough to find as its potentially bugged in game. However to get one that works in game, head over to the armor vendor on the groundbreaker.
Buy the water-resistant wear and padded helm and return to celeste on Byzantium. If the vendor doesn’t have these specific items leave and come back as vendors stock changes. These two items will complete the quest.
If that does not work, try the work friendly farm gear and the low-pressure helm.