Remote Central doesn't have subscribe thread notication, so LowPro may net see it until he posts a new upgrade to his system and sees your post. You can try Rc mailing him.
In the harmony software under blu-ray and sony, try each upgrade until it controls your player, and not put up a message "BD3", which is telling you're using BD1 or BD2 remote code on a player set to BD3. There might by more then one uograde for players set to BD3, just pick one that has the commands in the directions needed to switch modes I posted previously. Once you do switch and you want to keep the harmony you're going to have repprogram it for BD1, that way you have two remotes controlling the Sony blu-ray player.
I just looked at the prices of use harmony remotes they are sky high. Even for used.
Personally I own very cheap Sony blu-ray player thats been upgraded to region free for both dvd & blu-rays. But the player only knows bd1 code which is 21516 in UEI remotes. So I can't test for BD3 commands, or codes.