Those rods you should be able to buy at a hobby shop (good luck) individually rather than buying a whole pack of 24 pieces. Also recommend you replace the servo horns/arms https://www.servocity.com/html/standard_horns.html. Make sure the spline count matches. Reverse the throw on the rudder servo and have your rod connection on the other side. That's going to cleanup and leave the elevator pushrod free and clean. What's weird about how the hobby shop did it for you is that whoever did it, made it harder than it needs to be.