1.
http://www.russellperformance.com/powersports/mc/brake-clutch-hose-kits/cruiser.shtmlIt appears Russell doesn't offer a direct replacement for the clutch. All that's needed is to measure the length of the old one and add whatever length you feel is needed, then simply order a hose of that length. It doesn't need to be specifically a "clutch hose for Valkyrie" to be functional. Since I live in the Orlando area, I'm ~55 miles from the Daytona J&P Cycles superstore. All I did was take a ride over there one day and bought all I needed in one stop.
2. First, you'll need to lift or remove the tank to gain access to where the clutch line is routed along the left side near the frame. Next, drain the line by sucking it out from the bleeder at the back of the engine. Now you can remove it from the m/c at the top and start the removal process along the routing. You'll note a portion is metal but can be replaced with 100% braided steel line, mine has been in place for years.
3. No more difficult than any other bleeding process, just takes a couple minutes longer since you do have to fill the line. Keep an eye on the fluid level in the m/c so as to prevent air being drawn in by letting it get too low.
For purposes of protection, there were a couple spots along the way where I routed my replacement hose that I felt protection from abrasion was necessary. I simply wrapped that section of hose with a couple layers of old bicycle inner tube and held it in place with zip ties.