1911 ptb 774 Blank Gun replacement part magazin

hello this is a replacemant part for my , umarex 1911 ptb 774 black gun , its the little "well" made mag hold thing (i don´t know how its called in english ) ive serched like an idiot to get an replacement for it but umarex doenst sell it separated and have to buy a replacement magazine for 27€ (the price of the gun is about 100€),

so i decided to make my own, i dont have super precise measuring equipment so the most of the Dimensions are calculated or guessd

if some one could print thi