I need help modifying a CAD file

Hey guys
I have a custom project I am looking for help on as I have no knowledge, skills or equipment to draw a cad file myself
The file in question is here
I have a paper drawing with dimensions as to how I would like this modified.
Is anybody willing to make the modifications and post it on here for myself and others who may be interested or have a use for it?
As well I am looking to have it 3D printed in metal. Does anybody know if it’s possible?
Thank you!