Finding a Spot for Salah at the Office

Assalamu alaikum, I'm a sister living and working in a non-Muslim country. I don't wear hijab yet, but I do try to pray regularly. The issue is, it's really tough to find a private place to do salah at work. Every office here has glass doors and no locks, so no privacy at all. Plus, the firm has strict rules about clothes-you have to change into work attire and can't bring outside stuff in easily. Honestly, I can't pray without people seeing, and I can't put on an abaya or hijab because they're not allowed in the work areas. So far, I've only thought of two options: salah in the big bathroom/wc, even though the qibla isn't aligned with the toilet (I know it's mekruh, but maybe as a last resort?). Or, I could pray sitting in my car-I have over an hour's drive home and no masjid nearby. Praying out in public at a parking spot just doesn't feel comfortable for me. Any advice or similar experiences would be appreciated!