1. Separate units on a plate, mounted on tripod, so they can be reasonably co-aligned. May need an Ashbury electro-optical rail grabber to help with alignment.
2. Leopold or Hensoldt spotter with a Badger Ordinance SLICK cage, with a LRF (like a terrapin-x) mounted to one of the picatinny rails.
3. Possibly an Athlon Cronus Tactical and use the included pic rail mount to put a LRF on top. I don’t know how well it aligns, but it should be close.