Joel,
I guess my first question, is why does it have to be that brand. I have used over 30 different brands of powder paint, and they all work well and do their job. Some powder paints are easier to use and apply while others I wold never use (ie Harbour Freight). If it is a color you're looking for, get the RAL number, and find a good company like Dupont, Sherwin Williams, give them the RAL number and get a quality powder like TGIC.
Now as far as weedguards, I only know of two companies that sell anddistribute weedguards. fishingskirts.com which has the fused end which comes in med and heavy and Kayser Lure out of Ursa, IL. Kayser Lure has the fuzzy ende weedguards, which come in light, medium and heavy.