The Gatsby and Gatsby Grande are clones basucally of the Sierra and Sierra Vista line. I do not make the Gatsby kits but do make the Sierras. What is nice about the Sierras is that the tube size is the same but the kits are different in that the Vista has more thicker parts so that casting larger pieces is very possible. There is more room on a sirrea Vista blank than a Sierra and the same for the Gatsby Grande as opposed to the Gatsby.
Here is a side by side photo and remind you these are Sierras but you will get the picture.
The 2 on the left (brass braiding and stainless steel braiding) are both Sierra vistas. The next one which is the copper braiding is a Sierra and the final one which is an Elegant Beauty (fancier form of the Sierra and the twist mechanism is in the cap as opposed to the barrel on the Sierras) is a chrome weave.
Hope this helps.)
I get the Chrome weave from one of 2 sources
Chrome XC Braided Sleeving
This is the most complete site for all braiding materials especially sleeve form. In the chrome I use the Chrome XC because it has more depth to it. It does look cool.
Braided Sleeving Products From Techflex at WireCare.com
I use to get my copper from ebay from a distrubtor in China for the cheapest prices. If you are not doing many, any source will do. I am sure there are others too.
I too do not want to hijack the OPs thread. To get to one of his questions as to which sells better, this is a subjective question. For me as i said i sell the Sierra line and have had good success with it. The thinner pen is probably more of a women's pen but i have sold both to both sexes. Alot has to do with the blank that is put on the kit. I always said that is the key ingredient to selling pens. The elegant Beauty is a also a great pen and one I do well with. The Sierra Vista makes a great pen base for those castings that have pieces that are thicker. You can get away with more with that kit. I wish companies would make other kits with smaller tubes and more meat to do casting with. That is a pet peeve of mine. Why do kits need such large tubes??? Empty air space is all that I see. I get the fact of the weight thing but man some of those tubes are huge.
I see you think you have a source but i strongly say search around you maybe surprised.