How do you add characters made in private character editor to text?

I'm making a training module for a hand pump, and the screen uses some custom symbols. I recreated these in Microsoft's private character editor on a Windows 7 machine. I can use them in other software packages but cannot get them into my text box I'm using in Unity. Does anyone have any suggestions?

I've tried good ole' copying and pasting and I've tried using the Unicode expression in my script ('\uE000' etc.). Neither have worked. The characters are saved to the arial font package on my desktop.