I would use a local rigger and have him get the parts. Anyone with a swage machine can make these. Provide the rigger the Rigrite link so parts may be purchased. That way the shrouds will be measured and built exactly to the length you have. The turnbuckles don't need to be Navtec since they are out of business. That way if a slightly longer or shorter turnbuckle is used, the rigger can compensate the wire length.
If you can't find someone closer, I used Andy Schwenk at Northwest rigging in Anacortes Wa. I replaced all shrouds and set the rig, then sailed to Hawaii. Rechecked tensions here,and they had not changed. Andy is a sailor and racer. email is "firstname.lastname@example.org"
There are a couple of rigging shops in Portland. I don't have any experience dealing with them but found them online. West Coast Sailing, Rigging Products Inc, and Schooner Creek Boatworks. Schooner Creek is well known and might be the first place to try.
This same exact breakage just happened to me. One strand of lower shroud broken at the t ball.
#1 Did you do much sailing on it after the one strand broke?
#2 Can anyone recommend a temporary rig tune that will put less stress on the lowers? I don’t intend to go out in 15kts it more, or in swell. I’m also just running a 100% Jib this season. Would it be crazy to go out for a day sail before this is replaced?
Thanks for everyone’s input over the years on this forum. I’m in my first J30 season and appreciating all the collective knowledge.
This is a pretty easy replacement since it's not too high up the mast. I wouldn't risk any sailing since a shroud failure at the spreader could lead to much more dangerous (and expensive) damage to the mast.
Be careful /stay clear when you loosen the damaged shroud for removal in case it springs since you'll be right under it (and I would replace both since you're going through the trouble)