Western Force fullback Jono Lance could return for his side this week after being injured against the Brumbies in round 3.
Adam Coleman and Luke Morahan are also available for the Perth franchise's clash with the Cheetahs in Bloemfontein on Saturday.
Haylett-Petty also returns to the squad after playing in Australia's home series loss to England, the Wallaby winger has been named as vice-captain of the Force.
The Force play one game in South Africa against the Cheetahs before returning to Australia to play the Stormers at home.
Western Force touring squad:
Jermaine Ainsley, Chris Alcock, Marcel Brache, Adam Coleman, Angus Cottrell, Pek Cowan (c), Dane Haylett-Petty (vc), Tetera Faulkner, Kyle Godwin, Peter Grant, Richard Hardwick, Jono Lance, Ryan Louwrens, Semisi Masirewa, Guy Millar, Luke Morahan, Matt Phillips, Ian Prior, Ross Haylett-Petty, Araru Rangi, Junior Rasolea, Harry Scoble, Brynard Stander, Ban Tapuai, Francois Van Wyk, Rory Walton