Try Don Collins first... http://www.collinscraftgrips.com/
He doesn't list Beretta or Detonics, but could probably make them for you.
He has corian grips in white and "aged" yellow, plus some very nice wood grips. He also works with Micarta, dymondwood, maple, walnut, etc.
has their aluminum grips for the Beretta. These work well. I have a set on my 1911.
will add a logo of your choice to Aluma grips. They also laser-etch
polymer "ivory" grips for the Beretta as well as do logos on wood and "pearlite" grips.
Finding grips for the Detonics will be a challenge. They were never a huge seller and you'll likely have to inquire of each grip maker how much they will charge.