Rough guesses as a starting point. Could be factors of ten either way!
Wings - complete assemblies are going to be in the region of £40,000 each
Engine - About £1,000,000 - £3,000,000 each
Chassis - About £3,000,000 each
Wheel - Roughly £5,000 each
Steering wheel - Around £15,000
Megabucks in other words. How exactly do you cost them? Each one has thousands or millions of man hours of research, design and manufacturer, and are made in tiny quantities. Do you price up each one with each man hour at £50/hour, or do you spread the total cost over the total number of items made per year, or do you just make them within an annual departmental budget and sod calculating the 'cost price' because you're not selling them?
You might be able to get vague answers if you write to the F1 teams - they are usually pretty nice with letters. Emails and phone calls won't get you anywhere, and Google is shit for that kind of research. But each F1 team will give you a massively different numbers(except perhaps for the wheels).