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Found six j reworked 3d models.

free
grabcad
Prusa I3 Rework
free
grabcad
Dragonfly sheetmetal puzzle, insect, 3d model, puzzle, metalcraftdesign
free
thingiverse
CharlStruder For E3D and J-Head on Prusa i3
free
thingiverse
CharlStruder For E3D and J-Head on Prusa i3
free
thingiverse
Prusa i3 Rework
free
thingiverse
Fan duct for active cooling, supportless, parametized OpenSCAD