I got mine at a local speed shop but I believe Summit and Jegs both sell them. Mine is B&M pn 692402. I think there is only one bigger from them.
Flyers looks a lot cleaner than mine. I used the fittings that came with the cooler to tap into mine.

 

Yes ... I cut the original line. I still have the original line that I cut out. If you look at it, I cut about 1-2 inches of steel line past each side of the rubber part. This way, if for some reason I ever want to take it out, I can use a short piece of line and hook the factory one up without any problems and it will even look factory to the untrained eye.

I got the 24k GVW one as well. There is one larger, but it doesn't come with the mounting kit. Got the kit for around 50 and the line for about 6 I think.