Created using Fusion 360, AI and OpenSCAD, to be used to stamp My Email address or a single line of text, Can be printed in PLA just remember to sand the surface of the stamp with 800 Grit before use.

Usage:
Open the OpenSCAD file edit the EmailText parameter to Your Email or the Text you want, then if required adjust the TextSpacing, CubeWidth & TextHeight as required.

Handle and base plate were created in Fusion 360.  The text stamp part  was mainly generated using AI tool, asking to to create rectangle of xyz dimensions then add text centralized then extrude then mirror, then tweaked the rest manually from there.

Will test TPU when printer is in better ventilated location.  In the meantime I have had some success by using Vallejo Liquid Mask on the stamping faces, but does need re-applying again every 10 or so Stamps.