Quite a few deals her for Syzmik Workwear. I've owned one or two pairs of their pants and they've been pretty good, much better then Bisley or FXD, at this price point I'm not sure what would be better value, good range of sizes left but beware shipping from Perth so factor that in for single items.
Other items
https://entireworkwear.com.au/syzmik-men-streetworx-comfort-… $36.55
https://entireworkwear.com.au/syzmik-mens-cordura-duckweave-… $11,81
Would these look too out of place in an office? I work in the automotive industry (customer facing but commercial vehicles - not sales). My customers usually wear a combo of drill pants and hi vis.