Hi Jim.
No parts required except 1) a new number plate (7" x 5") - make the numbers and letters as big as you can within that to minimise probs with plod, 2) a replacement rear light lens with a clear window for number plate illumination (mine is Kuryakyn, but the HD one is fine), and 3) the "Cloisonne" to cover the hole. Part number for that I think is 59423-03 - it's a restricted part, so you'll need to give your VIN when you order it. The existing bracket for the number plate is held on with the same two bolts that the reflector on the US bikes is held on with, so just take off the indicator lights bar, take out the two bolts, remove the bracket, put the bolts back in, put the indicator lights bar back on. Just disconect the connection to the standard number plate light (inside the back light - just unplugs).
Windscreen is a light green tint Cee Baileys - quality is fantastic! Best I've ever seen in a HD screen. I recommend them, though they are expensive here of course. Is it a Cee Baileys one you have?
Jim