Anything's possible in today's economy, but that hasn't happened yet as far as H&R is concerned, H&Rs are still in stock at three distributors I checked, RR Arms has over 20 of some chamberings, SSI and Zanders both list them instock, none list any H&Rs as discontinued, I'd be more inclined to believe those dealers are just not carrying them any more. It's also possible that Remington is changing model numbers along with the serial number changes.
Tim