There are tilesets in Plural's "Orientation" that seem like they might be what you're looking for... not sure how many of them are for re-use off the top of my head though.
There's also Egomassive's 'Gray Matter' and 'Rust Bucket'; Elder's four 'Space' tilesets; and HeadGrinder's 'Rusted Industry' (and maybe the Curved Glass / Stained Glass / White City series, depending on how representational you want to get).
Neither Bulbapuck's 'Mystical Patterns' nor Grookie's 'Purrty Circlurz' were intended to represent high-tech environments, but I suspect they could both be repurposed for that kind of use. Of course there are any number of default tilesets that could be similarly repurposed...
Plus there's all the tilesets I didn't have handy or didn't think to look at. But hopefully these can get you started?