Re: spotter reticle ?
I have seen a reticle in a Swarovski spotter, however it was a foreign military unit and my understanding is, Swarovski will not touch it here. so the answer is, at last look, no, no one makes a reticle commercially available for the Swarovski.
What needs to be done is a reticle needs to be added to an eye piece much like the Zeiss used to do. But no one is upgrading the eye pieces I have heard about.
There was a post running around about someone doing something to Kowa spotters, but I have yet to see it, although there were hints that it did exist.