Just because they aren't on SACC's web site, doesn't mean they don't have them. Just call or e-mail Scott. The only non off-the-shelf parts of the kit are the U-Joint to CV adapters and SACC manufactures them in-house.
You won't realize how much vibration is caused by your U-Jointed half-shafts until you switch to CV's. CV half-shafts also weigh significantly less than their U-Jointed counterparts.