英国采购需求：集装箱房屋，集装箱房屋，可扩展集装箱房屋，可扩展集装箱房屋，折叠式集装箱房屋，居住集装箱房屋

I'm looking for a quote for a 20ft expandable container house. Specifically, I'd like it to feature black windows and grey walls, with no internal furnishings included. The design should incorporate gas struts for the walls and a glazed entrance for added aesthetics. Additionally, please provide details on shipping options to the UK, including estimated delivery times and costs. I'm eager to understand the complete pricing and any other relevant specifications you might have for this type of container house. Thank you!