Built To Last - 40K IMPERIAL BUILDINGS TEMPLATES
Some of you lovely people may think back to the Card Buildings Of Yesteryear with a fond sigh and a heavy stone in your heart...
Remove that stone, for we at The Fluffenhammer have managed, with thanks to Lee Trayler, to upload scans of The Firebase and The Powerstation from the 90's 40k.
3DCults carries multiple STL files that would work for the bulkheads, which you can find HERE