I need help installing my stove

Here is the instructions page on how to install it. It's simple, but I don't have the pieces that they say "supplied by installer", so here is what I need:
I have two questions, do the stores like Lowes or Home Depot sell tubing with already made flared end (like in the picture, step 4)
... and the other question, where do I find a gas supply hose that has the connection that fits the 16oz propane cylinders? I searched everywhere and I can't find one.

- 1) 3/8” O.D. gas supply tubing w/ flared end (6" long)
2) Flare nut
3) Gas supply tube
I have two questions, do the stores like Lowes or Home Depot sell tubing with already made flared end (like in the picture, step 4)
... and the other question, where do I find a gas supply hose that has the connection that fits the 16oz propane cylinders? I searched everywhere and I can't find one.
