Looking for a reputable, affordable Workshop that focuses on augmentations

I've been saving some of my request funds for a rainy day, and I've been itching to spend it all on some good quality augments. First thought was Firmament Workshop, since that's the same place where the Silver Bullet got his titanium skeleton, but just looking at their prices made my head spin...

I also found out that Screw Atelier also manufactures mods as well as their weapons, but I doubt the quality of them seeing as my brother's Screw-brand drill jammed when it hit something slightly harder than concrete.

I have a personal budget of about ~10M Ahn. Anybody have personal recommendations? I'm mostly focused on endurance more than outright physical strength since I'm working for the Zwei.