Searched alot but no luck so i do it myself, less filament than original but still stable 

• Use original Bolts and Nuts of your steel shelves
• Honey comb holes have same dimension with HoneyComb from RostaP, but i didn't test with his components, you may try it but i'm not sure because depth is different

Infill: 15%
Layer height: 0.24 (i use 0.4mm nozzle, you may use higher layer height with bigger nozzle)

• Highly recomment beg and basket from Kim-Janosch and SkadisHook from PRINTSY