I'm scared already and they're just photos of the darn things. An Etsy magician by the name of "Kreatworks" crafts beautiful/horrifying sculptures from recycled metal, with the alien queen above just one glorious example of his work. You can buy them too... if you live in Thailand and have $15,000 to spare.
Measuring 2.45m in height and weighing 400kg, the queen, or "Recycled Metal Cruel Monster" as it's known on its store page, will set you back a cool $15,854. Made from old car and motorcycle parts, as well as miscellaneous machine bits, the statue can be pulled apart into six components for easy shipping and storage.
A lacquer coating keeps it safe from deterioration, though I'm not sure how it fares against sentry gun rounds.
Sadly, Kreatworks only ships to locations within Thailand, which rules out a steel xenomorph visit to Australia. Oh well, at least we can admire the handy work. Here's the "Recycled Metal Hunter with spear" and "Recycled Metal Dreaded Robot", though you can probably guess their inspirations.