The 45-year-old man sustained serious injuries to his face, upper body and leg, and remains in hospital, after the attack at the Finks' North Side clubrooms on February 13.
On Wednesday, Crime Gangs Task Force searched nine premises linked to the Finks, including the South and Central clubrooms as part of the investigation.
Items believed to be linked to the attempted murder investigation were found and seized, including clothing and a stolen sawn-off shotgun.
The investigation is on-going and inquiries continue.
Police ask anyone has information about the incident or the identity of those involved to contact Crime Stoppers on 1800 333 000