David Hayes plans to import champion Australian jockey Damien Oliver to ride one of his Hong Kong Derby runners. 'I look like having maybe four runners in the Derby and I'd love to offer one of them to Ollie,' Hayes said after Helene Momentum stormed his way into Derby calculations in the final race. 'I don't know which one at this stage, but I'm sure Gerald Mosse will want to stay with Elegant Fashion. Being a Group One, the Jockey Club allows owners to bring in top jockeys and Oliver is right up there with anyone. There are three group races on the day and another three Class Ones, so I expect I will have other rides for him in some of those races, too.' Oliver has ridden with great success for Hayes in the past, although his more recent visits to Hong Kong have been to partner the brilliant dual Hong Kong Sprint-winning sprinter, Falvelon. On the other side of the coin, Shane Dye said he had turned down an offer to ride Sydney-trained three-year-old Thorn Park in the Doncaster Handicap (1,600m) at Randwick on Easter Saturday. The horse firmed to one of the strong favourites for the $11 million race on April 19 after winning on Saturday. 'It's a Happy Valley meeting here, so I'm committed to that,' Dye said yesterday.