I only got as high as the 4 lead straight version in top view in this post:
A google search for “frtizing part lm2575” turns up a part (SMD though) on github, but it is broken in a variety of ways (for starters the fzpz file format is incorrect so it won’t load). I corrected that but breadboard is also misaligned, but it in any case makes a good place to start from though as the fzp file looks to be correct. You can substitute your pcb and svg files in to this part (just unzip the fzpz file below to get the .fzp and 4 svg files, modify them and rezip them, then post them here via the 7th icon from the left in the reply menu) and I can make any changes needed to fix things up.
LM2575.fzpz (7.9 KB)
Peter