I have been searching for months trying to find another " sissy bar chrome metal lock box" that I purchased about 25 years ago. The item is similar to the lock box that was used on a HD knucklehead, but that item will NOT work for a sissy bar application.
I think the item was purchased from Drag Specialties or Custom Chrome at the time; however, the lock box is no longer available from those sources.
Yes, but I used this item on my Bonneville's. The original box was used on a HD but my box would fit any sissy bar application. The HD application was for a frame mount and not a sissy bar application.
It's a pain when you know something HAS to be out there in someone's pile of neglected stuff (junk?) they don't even recall what's there anymore. You might try getting in touch with Buzz Walneck as he had tons of older stuff,....... If he is still around. Yep!,........ But things have changed since cycle trader. https://walneckswap.com/
A "Sissy Bar" is the nickname given in the USA for the passenger hand-hold required for motorcycles in the USA beginning about 1967.
It PROBABLY began in California, when that state first required a strap across the rear seat as a passenger hand-grip sometime earler in the decade of the 1960s. The chopper guys, tired of being harassed by the police to look for one, started putting high, then higher, rear hand-holds behind the passenger seat, making them into ornamental back-rests.
Because their women rode pillion, these became known as "sissy bars' (or, "bitch-bars" in some cases.)
The guys who wanted to make Hondas, Triumphs and BSAs into choppers adopted this style as well BUT, in my opinion, no British-built bike ever looked good with one.
I do not remember a different specification for california bikes. My '70 and '71 A65s did not have a passenger strap on the seat. A Harley forum has: The term "Sissy" was from 1864 which meant sister, and was an extension of the word "Sis". The term "Sissy Bar" was first recorded in 1969. But where the phrase was first coined, and by who is still a mystery. Wikipedia has something similar but there are no references. It could have been that passengers that needed to hold on were considered "sissies" and the bar kept them from falling off the back. A long vertical bar is easier for attaching backpacks and bedrolls than a small loop behind the seat. Plus it left room for a passenger.
If you can't find it on eBay you could "think outside the box". Try looking for a small tractor toolbox or car "under hood" box. Vintage highway signal markers came in a really good size metal box. Also have seen some interesting first aid boxes. You may have to add a lock hasp to some boxes. A Triumph Cub tool box is a good size but would need a lock.