Mod update:
I couldn't find a "one source" retailer for all the parts to do the mod, so I had to order from several places. Digi-Key had the .25 watt 1000M resistors on back order until December, so I went with the .5 watters. They are bigger and more expensive than the .25 watt, but they will work.
I've also been in contact with Scott Dorsey, the author of the article in Recording Magazine. He has been very helpful. If this mod turns out to be a major improvement and lots of people start doing it, I suggest we call it something like the the "Dorsey Mod."
I also had to order twenty of the 2SK170BL FET's as a minimum, so I'll have lots of extras in case someone else wants to do the mod. These were the hardest items to find too. I made a recording today using my un-modded Oktava MC012's with the matched capsules I have.
The rest of the parts should be here this week, so I hope to have time to mod the microphones soon after.