Sighter Tube for Spotting Scope

[TroutTempter]

After almost a decade with a NightforceTS 82, I am springing for a Swarovski ATX 65 mm.

One thing I really love about the NF is the Picatinny attachment for a small red dot.
My question is: is there a 3-D printed or other sighter tube for the Swarovski, similar to the one built in, on the BTX?

Thanks for reading my question.