In New Egg:
Try looking at the description if it has the Anti Fraying thingy.
In Razer website:
No need to worry they updated everything. So what i mean is that Razer wont be sending the old version ones, they will send the newer version ones instead.
Oh yeah and it comes in 3 sizes
Omega ( Small )
No name for medium just Goliathus itself
Alpha ( Large )
And here is the website
http://www.razerzone.com/gaming-mouse-pads/razer-goliathus-speed-edition
(As you can see the picture of the Goliathus, on the upper right corner it's written "All new" so that means it is the updated version, and in the picture the stitches are not seen properly)
In new egg:
And for your Razer Naga you could buy branded mousefeet such as X-TRAC
http://www.newegg.com/Product/Product.aspx?Item=N82E16817114173
You just have to cut them off ( do not use scissors )
Use a nice one for cutting tough stuff
In Razer:
They sell Razer Mousefeet for Naga
http://www.razerzone.com/gaming-accessories/razer-mousefeet