Racing Post Ratings for Godolphin's Derby Runners

[Monarchos1]

Anyone know the conversion from the top Racing Post Rating of 112 for both Desert Party and Regal Ransom into a Beyer and/or BRIS speed number? I've seen one conversion that puts that at around 98/99, respectively, and another that approximates it at 105/106, respectively. Big difference so I'm curious if anyone has a source for an accurate conversion?