The Agpeya certainly is available, on Amazon, of course, but also elsewhere. Then there's the Melkite "Publicans Prayer Book" which you can get here: https://melkite.org/products-page/prayer-books/publicans-prayer-book.
If I had a spare $50 I'd snap up a copy pdq.
I'm pretty sure the Ukrainian Catholics have a prayer book but I'm not familiar with it.
There's a YouTube channel called "Orthodox Review" wherein he reviews many Orthodox *and* non-Orthodox prayer books and other spiritual reading material. He's done reviews of both the Agpeya and the "Publicans Prayer Book". Well worth taking a look at, imo. Here's the link: https://www.youtube.com/@OrthodoxReview
Personally, I've been using the Orthodox Christian Prayer Book published by Newrome Press since December and really like it. And I'm a Byzantine Catholic.