Hi, I cirtainly have a plastic headlight shell surplus, K3 uses replaceable halogen (pt45 bulbs I think) same as the 500/4 etc. At the moment it's too early to say if there is enough interest to warrant breaking the bike (550) but I may have a non original headlight (cibie, I'm told) to fit the shell. I'll sort thru whats there to check condition etc and get back to you with a price.
I'll sort thru as I go and see if I have the rims etc. There are basically 4, mostly original bikes stripped to restore so I'll be needing to sort each bike into a 'pile'/ box then decide their fate, ie break, rebuild close as pos original speck, or possible special. I'll be keeping one lot of good parts at least as spares for my runner as this normally gets used as daily transport. So far i can add to the surplus pile, sumps, black or alloy, and electrics mounting plate for under left side panel.