Ladder roof hook

Hello all great forum you have here. I am in search of a ladder hook that will fit over the peak of roof without damaging the shigled over ridge vent. The only ones I can seem find are made by qual-craft or acro. In the pictures it seems like they might damage the ridge vent because the radius of the curve isn't enough. Has anybody else used these ones with a shingled over ridge vent. I have to replace the caps and ridge vent because the HO isn't happy with the way last guy did it (among other things). It's one story 12/12 roof. Any and all help would be greatly appreciatted.