The first thing to do is identify the part number to the fork tubes from your model, if you didn't read this yet now would be the time (it's part of your Welcome Package).
Lots of people new to the vintage Honda motorcycle world are unfamiliar with how to identify the parts they need and where to look for them. The question is often asked: "Where can I find a (part name)?" The first step to finding any part for any of our favorite Hondas is to properly identify...
www.vintagehondatwins.com
Following those steps, you get this part number for the tubes that originally came in your front forks.
51401-283-020
From this source
✓ Get the PIPE FRONT FORK ✓ Manufacturer Part Number: 51401-283-020 ✓ Quality part
www.cmsnl.com
Then you search the internet for that part number, or cross-compatible parts if possible. I checked the earliest CL450 listing shown in Franks's Forks and the part number for '69 to '72 CL450 tubes is different (and that listing is not completely correct, the actual '72 CL450 is the K5 with the clamp-style top bridge so it wouldn't work). Upper fork tubes from a Bomber are pretty unique, they only show fitting a Bomber basically.
Fitting models
Other models that this item fits to.
A search of the part number for eBay listings shows nothing at the moment. A call to Frank's Forks might get you better information, they've been around a very long time.