I can do this also, and would be pleased to assist. I learned this from Guy and a magazine article. I purchased a couple of kits from Flander's which has a whole variety of little bits needed for the job.
On the Ebay Bobber, I did not like that all of the NOS cables I bought had to be adjusted almost to their maximum (longest) to work. Since cables only stretch, I wanted to start with my cables adjusted to their minimum (shortest) adjustment. I therefore had to shorten my front brake, clutch and throttle cables.
The job is a bit messy (soldering flux ), and before the soldered cable end is ground down, looks like hell, but the end result is a strong and functional cable any length you want.
Dennis (250) 562-1590