I emailed Sightron CS to find out for certain:
John:
Please contact Bill Ackerman at Optical Services Inc 575-589-3833. He actually makes our benchrest dot reticle. Please contact Bill for reticle variations and cost.
Thank you,
Eden
John,
Thanks for the followup. If I call Bill Ackerman, I'll post any further pertinent information. Like I said, I've got a Sightron SIII w/Mil-Dot reticle on the way. Although I think it will serve me fine, I'm still interested in learning if there are any customized reticle options available - and at what cost. Of the factory options, I wanted the Mil-Dot.