His Artos recipe is great, although best suited for small parishes or parishes that have less attendance at Litya or Atoclasia services. I have made it several times for our parish with great results. In Greek Parishes I have seen the Loaves as large as Green Style Prosphora loaves.
However, I can not vouch for the Artos stamps, I ordered mine last November through our parish books store and have yet to get one of the three I ordered. Father does note on his website that is has a delay of unspecified time, probably because now that he is a parish priest with his own parish he has too little time to spend making the stqmps. I hope to get mine soon and when I do I will let you know how well they work.
He was assigned to a larger parish that had a priest who caused some turmoil. He has been very busy with calming the parish down. The bishop has visited several times to help him with the situation but sometimes episcopal visits can be demanding of a priest's time too. Many of his parishioners are immigrants from the middle east and believe me...they can be very demanding on the time they require from their priest.
Especially if they need to be calmed down LOL!
Fr. George speaks some Arabic and looks like an Arab too with his Italian appearance so he has been a good fit for them. But he said it will take some time to restore order and peace.
You could try emailing him directly in case your order was misplaced when he moved.