Thanks Chromie for helping me locate a source for Sako Screws. If anyone is interested here is a short report on my experience.
Just to report back, I ordered 4 sets of Sako Action Screws from J & P Custom Products. I communicated with "Pete" and have to say these folks came through big time.
I measured the screws that came with my rifles and the dimensions were not spot on with dimensions for those available at J&P. I sent my measurements to Pete to see if he thought they would be "close enough" to work. Pete's reply was "no problem, we will make them to your exact measurements / specification". So, J & P provided a service of building custom screws...at least for those rifles that they service.
Turn-a-round time from my order to receipt of the custom made action screws was very quick, appx 1 week. Ive installed 3-sets so far. Their product is well made and the blue quality is right up there with my old Finnbear L61 R in .264 Mag. The hex heads are so much easier to tighten, loosen and torque than the old style flat-head screws. I think I will eventually convert most of my rifles.
It was a pleasure to buy a quality product from a company that was so helpful.
Silvertp