If there is a Vader themed font on your incoming VDR hilt, you can definitely copy it to your rival hilts. As far as specific Maul fonts, I am not well versed on them, but I am sure saberfont.com has what you are looking for. Additonally, you can change the boot sound of one or both of the fonts already installed on your rival hilts to use Darth Maul quotes when the font is selected or started up from deep sleep.