Ben Edmondson, the Western Australia fast bowler, will play for Gloucestershire for two months to replace fellow Australian Marcus North.
Gloucestershire had hoped to secure Umar Gul for 2007, but the Pakistan Cricket Board failed to give them their permission. Edmondson had a prolific season in 2006-07 with 41 Pura Cup wickets and will be available to Gloucestershire from June 15.
"I played against Ben in Western Australia with the England Academy squad and was thoroughly impressed," Jon Lewis, the Gloucestershire captain, said. "He has the ability to swing the old and new ball at good pace and will be an exciting addition to our squad."