The hot air intake is difficult to find as they were often discarded. It has been more than twenty years and I am still looking for one for my F28. Likely when I start the restoration up again, I will just make a copy.
The acetylene tail lamp should be easier, since they were an aftermarket accessory used on any make or model. You just have to decide which brand you want (to match you headlamp?) While far more common, lighting sets and accessories are getting very expensive. The CS1 Norton or SS100 Brough Superior owner are competing for the same Powell & Hammer tail lamp you are after and probably have deeper pockets! Also some folk just collect lamps, like they do hood ornaments and radiator badges. So though there are a lot around, demand is brisk.
I need a Brooks B220 saddle for one of my Dougies, but that same item was used on other top end (expensive) makes and models so when one does come up for sale they fetch very high prices. Meanwhile you wait and hope for a stroke of luck. All part of the hunt!
-Doug
