You will need normal soldering supplies, 2" copper pipe, 6 gage copper wire (#4 will work also), hammer, file, wire cutters, visegrips.
Start by hammering about 7" length of your round wire into a square. Lightly hammer one side, turn up on edge and hammer down the length again. Now hammer this square into a wedge by hammering at an angle along one edge only. This will beging to curve your wire as well.
Now use visegrips to help hold the wedged wire as you bend it to fit the pipe.
This will take some time to get a good fit. Use the leverage of the extra wire to help.
Once it is close, cut off the excess.