Here's a great set of bases from Secret Weapon, called Tau Ceti.
These are the 50mm versions.
And the 40mm.
While there's a lot of great textures, it's clear that just about any footprint will work with these!
As with all the Secret Weapon sets, there are multiples of five... five of the 40mm, and ten of the 30mm. The first batch of 5 in this image...
And five more!
The entire set, available from Secret Weapon Miniatures.