Actually now, making the handle is gonna be hard. All the parts are sold out at the Custom Saber shop.
I was gonna get an adapter and use a sink tube, but think I might just use Iron Pipe and fittings lol!
Sink tube might be possible, but I will have to find a metal collar to hold the blade and I can thread.
Think regular smooth 1" pipe fits inside the 1.25 kitchen sink. Anyone who knows how to fit holder and
pipe and light together chime in please!
I may be able to help you in that department but I only have materials for hilts that take 1" blades at the moment.
I have literally meters of 35mm OD 30mm ID UK sink tubing (ours is a wider diameter it seems) and have a couple of items I use as blade seats for it. The pipe reducers for the tubing work great as well as a specific brand of glue stick container which I've been diligently collecting (silver painted one seen top left in the pic below)

Both are a real tight "push fit" for polycarbonate blades, so in most cases, don't need blade retention screws. They've also been field tested in combat sabers I made for my kids a few years ago as Christmas presents (they still have to ask me to remove the blades even now)

I also have a few short lengths of alu stock tubing (working my way up to stainless) in diameters that work with the PVC sink tubing and came up with these lens holder assemblies:



Giant high volt PCB spacers made from nickel plated brass are the heatsink extension as it adds a nice bit of waight. Handily, they already have a hole running through the centre for passing the wires through (I use silicone wire for my LEDs as the coating is rated for temps upto 400°C and is far more flexible and less prone to snapping than standard wire) and the LED's star heatsink sits directly on top of that with a little heat transfer compound in between.
The tubing used for the lens housing is 22mm ID 25mm OD so the assembly can double as a blade stop for setting the seat depth. The seat itself I use in sections, or as the main body of the hilt which I then sleeve with increasing diameters of tubing to reach the desired hilt OD.