Unless you are a commericial tyer, I don't think it is worth the effort to get tied up in economics when it comes to dubbing. I've been tying for over 32 years and I've never run out of dubbing. A packet of dubbing really goes a long way and is probably one of the least expensive of fly tying materials. You'll probably spend more money trying to save money. Once I've bought a packet of dubbing, I don't really expect to use it up within my lifetime. I've got dozens of packets in different colors, types, etc. to cover all the bases, but I've never used one up.