For crimping the plugs you can go to your local Radio "THE SHACK" and get a set of D-Sub Pin Crimpers for $9.99. If they do not have this in stock, they can bring it in without shipping charges.
Servo City is a good place for odd parts and stuff but the prices may be a little higher. An Ebay seach of "Servo Plugs" can get you gold plated futaba male plugs to you door for about $0.50 a plug when ordering 10 or more plugs.
There have been many times that I have made trackside servo wire repairs with the radio shack tool and a new plug. I take the long servo wire and shorten the wire to exclude the damage section instead of trying to repair by soldering. Servo wires coated in vinyl likes to melt like wax leading to a future short.
I even have a servo that the wire was damage about 3" from the case, guess what, servo extensions will solve any placement issuses for that and I did not risk killing the servo by opening it up. I keep the servo with the short wire in a pancar where I the RX is mounted really close.