While I don’t have any experience with InForm, it’s surprisingly easy to replicate by taking the single channel fluorescence data then converting it into a colour vector representing first haematoxylin then DAB.
There’s a script linked below that transforms a fluorescent image into a pseudo-brightfield image and it appears to do a reasonable job:
The RGB vectors were found in Fiji by running
Image > Color > Color Deconvolution
If this is the sort of thing you wanted, you can find the ImageJ macro along with the example image here: https://bitbucket.org/davemason/makehdab
As the repo says, I give no warranty or guarantees about the utility or even validity of this approach, only that it seems to look about right.
Hope that helps!