Hmmm, can't see the authorities taking kindly to a letter to a convicted faker asking him to do some "reproductions" while he's in there!
This is very interesting -
"Despite these examples, there have never been any clear guidelines for nominating World Heritage Sites based on their relationship to astronomy, and this leaves many key sites vulnerable to neglect and irreversible damage. To try and fix this, UNESCO is now encouraging member states to put forward astronomical nominations
Unfortunately, only "lightbox" type arrangements will stand a chance though, on the basis of certainty. Mind you. the Sanctuary-Silbaby-Silbury alignment looks so accurate that it ought to be celebrated, but the middle bit doesn't officially exist so far. Give it twenty years and it'll get officially discovered maybe, and you won't be able to move for coach parties of Americans looking at it. There's a lesson for you there, maybe.