While looking around my girlfriends workroom where she does stained glass I came across this product,
Copper Foil Wrap and put some on my turntable mats. Thin stuff 0.025mm so it even allows enough room to go in the spindle hole and I wrapped it under the whole mat like the top. Makes a complete ground connection to the ground on the back of the pre-amp and seems to work well at reducing static electricity on the vinyl. Yippee!