Those look great!
I've never fished the Rocket Shad, but have made a small spinnerbait for many years, based on the Do It Crappie Spinner mold. I've caught many types of fish on them too, and when fishing highly pressured waters, often the lighter, smaller lures caught more than a typical size bass lure..
For craft fur, check Etsy, and look for extra long pile, or sometimes it's labelled as Mongolian. I've bought some that was very close to Polar Fibre, and I really like it for flies & jigs. Plus, for what they charge for Polar Fibre, around $5 for a pack, you can get about 5 times as much for $8-$9 plus the shipping.
I think I've posted this one before, but it's typical of the small spinnerbaits I make use, and I have dressed them with hair, and flash. This one is 1/8 oz and I've used the same frames in the Do It bullet style spinnerbait mold and made them in 1/4 oz.
I generally only add a singe blade too.