HP-16C app for iPhone/iPad - whom to call at HP?

[luckybuck]

Hi together!

For several years we have the 12C:
https://itunes.apple.com/de/app/hp-12c-f...41946?mt=8

the 12CP:
https://itunes.apple.com/de/app/hp-12c-p...24790?mt=8

and the 15C:
https://itunes.apple.com/de/app/hp-15c-c...20774?mt=8

So, what does it take to make an emulator for the 16C, too?

Would be so nice. Does someone know, who to contact at HP for this?

The other 16C emulators I do have, just waiting for the 'official' version...

Thank you all very much and have a good weekend in advance. :-)