...and it can all be yours for a measly £16,245 (or about $27,000) from the London-based Prop Gallery. Just check out all that insane signage (more pix at the link). It's a potent reminder of how a really well made miniature (built in this case by veteran modelmaker Martin Bowers) can trump CGI in terms of surface detail.
Several other props and items from Alien and Aliens are available through the site. I was very sorry to hear that Harry Dean Stanton's cargo pants had already been sold.
In the meantime... anyone got a spare $27K lying around?