Secret Weapon Miniatures now have 40mm Tech Deck Bases available.
From their announcement:
Hot on the heels of the other new releases I’m happy to introduce a new “Tech Deck” theme. These bases will be perfect for re-creating heavy industrial and sci-fi ship themes in your army.
This first set of 40mm round bases offers variation on each base while still being part of a unified theme.
Current sale pricing means these are available today at 10% off.