Gotta concede on this one & say you were absolutely right. Been watching the post for a bit & ended up reaching out to Sukoshi @ Avon this time around to "make sure". She confirmed that they absolutely do make the new Chrome trike tire for the 16" hd front wheel & said their website was wrong and they'd get it fixed asap.
I don't recall the specs for the old HD trike tire, but it kinda surprises me at how much deeper the tread is on the HD version in comparison to the 18" size offered for other trikes.