If you can't get in touch with Kevin for the 'group buy' price, Fine Lines will sell direct I believe.
You *might* be able to replace the fuel lines without dropping the tank if you wanted to. You need to remove the panel behind the seats anyway to get to the top of the tank to do the connections anyway. Both the OEM and the Fine Lines fuel lines are soft after the bend up towards the fuel tank, so it is fairly easy to fish them in and out. The only difficulty would be attaching them to the clip way up in there so they didn't chafe or flop about. If you're clever and have some long tools, you might be able to figure out a way to do it or otherwise secure them. Of course, if you drop the tank, you can replace any rusty hose clips, too. Dropping the tank will be way easier with a separate jack under it, and ideally on an almost empty tank.
As for jacking, each side of the Insight has three jacking tabs on either side. One behind the front wheel, a beefier one behind it and a third in front of the rear wheel. I put my floor jack on the beefy one, and lifted that side of the car until I could get 2 jack stands under that side using the other 2 tabs. After lowering it and making sure it was secure, I went to the other side and lifted it up all the way using its beefy jack point and lowering down onto jackstands. I then returned to the first side and lifted it all the way, carefully. With 3 ton jack stands and my lesser floor jack, sometimes the car would try and tilt the jack stands. If you take it slow and are observant, you can nudge the car to the side to sit firmly on the jackstands. A very smooth rolling floor jack and/or 6 ton jackstands would make the whole thing safer. If I recall correctly, I had my front jack stands fully raised and the rear ones a notch or two down. I made sure all the jack stands had the weight nicely centered on their feet and the car felt really secure if I nudged it. I also retained the floor jack with less pressure under one of the beefy jack points. I would've loved to raise the car a little bit more if I could have, but I was able to move around pretty nicely on a creeper. Prior to jacking, I loosened up the lug nuts. Afterwards, I removed the wheels and placed some double stacked rims in strategic locations to provide some security, just in case something went wrong with one or more jack stands.
Before you do all this, I recommend getting a good long look under the car one way or the other and making an inventory of any other parts you might need. Also, make sure all your bleeder valves still turn. Presoak them with PB Blaster or the like and be very careful loosening them. They're easy to break.
If you want to drop the fuel tank, but your exhaust is too rusty to want to take off (like mine,) you can remove the rear bumper and carefully lower the exhaust down and to the right, hanging it from something using twine or wire. I was able to do this without cracking the rusty parts of my exhaust. I did leave the rubber hanger at the front of the exhaust attached for this.