this appears to be one of those instances where “have realistic expectations” is the best answer

as has been outlined, it’s indeed possible to find an eastbound TCON with lie-flats, but the time factors (either two connections or a less-than-convenient interline connection), and the very high probability that the price will be considerably more than a trip involving standard domestic F, would seem to outweigh any benefits of the 4 to 4.5 hours of indulgence