Seems to be more choices than I thought. Will check out the S&K's as well.
I did just call Talley, part number for the blued rifles is 252727.
There are a number of choices,
Current Production:
1. Leupold Sako ringmounts and Sako QR bases
2. Sako Optilok ringmounts and 2pc mounts
3. Conetrol
4. S&K
5. Talley bases
6. Millet ringmounts
7. Redfield/Leupold bases like GWB's
Discontinued but can be found:
1. Sako Vintage ringmounts
2. Buehler
3. Kessel ringmounts
4. Sako Lynx ringmounts
I'm sure I missed a couple