strobeone, are you sure you want a jib sock? If so, best of luck but consider a UV shield strip sewn directly to your jib. Downside is it makes the jib a little heavier (but not too much if you have them use the white material) and it'll have to be replaced every few years. IMHO, the jib sock can be a hassle too. It'll require the use of an additional halyard to run it up (spinnaker halyard?) I've seen them flap incessantly and get shredded in a thunderstorm - maybe the ones I've seen were not properly sized though.
If I've misread your Q my apologies.