thanks to realisticidealist, I was able to get my hands on a couple pieces of info.
1. The Reform Party held a couple of primaries that went along with the regular schedule of things.
2. They also had a national mail primary that Buchanan won.
3. Specific primary results are here. Sadly, there are only four states that realisticidealist told me about, so I assume those were the only ones he could find results for, or the only ones that held individual primaries.
February 22: Michigan (Trump, 69.54%)
March 7: California (Trump, 36.96%)
March 7: Missouri (Buchanan, 75.17%)
June 6: Montana (Uncommitted, 100%)
August 11: National Mail Ballot (Buchanan)
Therefore, we get this itty bitty primary map to go on:
Blue-Businessman Donald Trump of New YorkRed-Activist and former Whitehouse Communications Director Patrick J Buchanan of VirginiaGreen-Uncommitted