First LED saber
@meatloaf: Look around at fx-sabers.com. Many manufacturers are listed and active there. If however you prefer reasonable prices you are probably better off building one yourself from scrap metal and/or parts such as from thecustomsabershop.com (for I've calculated the costs for self-made MHS sabers to the prices of e.g. JQ Sabers MHS sabers and the differences are inappropriate IMO).
For custom and original parts and shapes you'd be better with sabersmiths unless you are skilled with lathes and stuff.
the design parts are self-explanatory. however, the electronics depend on the design (in terms of space in the inside etc) and on what electronics you want it to have precisely. on the other hand, chassis installs depend on electronic parts you want to fix inside your hilt.
I went with a design that called out to me...coinidentally the name of the design is"arbiter" which means judge....ultrasabers.com is a good place to get good mhs hilts at decent prices... thecustomsabershop.com is good for getting the mhs parts for your own deisgn of sorts and the have a hilt design maker you can use to design your own hilt with a variety parts that are premade
I highly recommend not to order at ultrasabers. While their hilts are excellent in durability and design, their blades are not and electronic parts are sometimes bend together instead of soldered. There is more quality lacks, I just point out the most obvious and not getting into the specific stuff like parts fixation or LED optics.