I have had to replace some of the bolts/machine screws (theyshook loose! there's not enough loctite in the world for these bikes...)
So I thought I'd put the size here in case anyone else wants to order them online without going to Home Depot, Lowe's, etc, and coming back empty handed.
For the sides of the headlight enclosure and all the plastic pieces, seems to be:
Screw - M6x20mm Extra Wide Truss Head Phillips Screws - 15mm wide head
Rubber Washer - The closest fit is a 1/4" cushioning washer, metric harder to find as they all seemed to be for sinks or not wide as the original. Which is 6mm ID 17mm OD ~3mm thickness
1/4" 0.25" ID 0.75" OD ~0.12" thick Abrasion-Resistant Cushioning Washer
Washer -M6 6.4mm ID 18mm OD Oversized Washer
Rear Brake Rotor Bolts: M8x24 Honda Rotor bolt with flat head and extended "shank"
https://specbolt.com/honda-rotor-bolt-m8x24/
The shank section is a bit longer than the stock "cheese grade" bolts, but still works perfectly. Also you may have to use a torch to remove the stock ones, mine had red loctite on them.