Just abbandon this strange 30 hole hub and adopt a modern 36 spoke brand new wheel. Conisder the following materila costs : rim 25 dollar, spokes + nipple 15 dollar, hub 25 dollar, rim tape 5 dollar. So you are looking at 70 dollar in matierlas, probably lower for a dealer. So roughly 180 in labor for a 3-5 hour job.
Simply buying a complete rear wheel is more economical.