I will dig through my spares here and see what i have for caps, i know i should have one good condition one, just have to find which bucket or box its in! I don't think i have a carb insulator but i will look for that too.
I agree on the exhaust, i have painted many of them with cheap bbq paint! The nice thing is if it starts to burn off over time you just hit it with a wire brush and recoat it, it does last a long time though. One exhaust i painted with that stuff has held up for three years worth of use now and its just starting to show rust at the bend to the head.
I should have some time to dig around through my spare parts later today and i will let you know. You might want to search ebay a bit also just in case i can't find one, they usually show up for $5-10 depending on condition.
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1984 Honda ATC200ES "Big Red"
1982 ATC200E "Hondie"
1988 TRX300FW "Project Quad" Still in progress....