Islamic Helmet Fatih Sultan Mehmet Migfer Low-poly 3D model

hello, i download the file. i'm a jewelry craftwomen and i want to use this helmet as a pendant. Yesterday, i went to 3d print company and told them to scale the item to 5cm lenght. they told me that the drawing is very thin, it would be easier to draw it from scratch rather than thicken. they told me that the drawer of this file can arrange the thickness. The helmet should be at least 0.15mm thick, the armor piece hanging behind it should be 0.1mm, the front bar should be 0.12mm, and the semicircular pieces on the sides should be 0.6mm thick so that 3d printouts can be printed. all the parts will be thicker than 0.06mm for to take 3d printout. In this way, we can use this product in a reduced form as a necklace. i want to print the object and this problem stuck on my mind.can u please help me urgently? thank u in advance