英国采购需求：超声诊断系统、多普勒超声、黑白超声、兽用超声、二维/三维超声

I'm interested in purchasing three medical devices: a portable X-ray unit, an ultrasound machine, an ECG machine, and a patient monitor. Could you please provide detailed pricing information for each item? I'm looking for competitive rates and any available options that come with these products, including warranties and after-sales support. Additionally, I need to know about export logistics to Uganda. Specifically, how long the shipping process might take and if there are any additional fees or documentation required for customs clearance. Your prompt response would be greatly appreciated as I aim to finalize this procurement soon.