mac24312 wrote:
Please tell me where I can get this stuff with to mod my new CG when I get it on Monday...

I am getting it assembled at Lowes and I know that there will be gaps in it..
There will be gaps (and don't blame the assembler) - its the design.
I found the 5/8" fiber glass rope by the foot at a local Ace Hardware. The one nearest the overpriced, eco-fad conscious town of Los Gatos. They went for wood stoves in a big way long enough ago to need some gasket repairs.
The vendor for much of this stuff is Rutland.
Beware that their kit with rope and adhesive has a flat 5/8" braid and an adhesive which tends to be too brittle for BBQ gasket purposes. Not recommended.
The flat rope from the above kit works pretty well (according to reports) on the left, right and front of the CG, but cannot close the gap in the rear.
A web search for >>fiberglass rope gasket 5/8<< (without <<>>) shows a number of options. Precut lenghts are either 6 or 7 feet (not quite enough, about 100" are required for the cooking chamber perimeter with no wastage ). You may need two of the available kits to complete the job.
A search of the local TrueValue and ACE stores would be my first choice before ordering what you cannot see.
Building my carbon footprint one chimney-full at a time.