"Having to get official clearance from NZ Cricket and the players association, it was always a wide stretch that he would get a game this season."
"While being frustrated by not getting an opportunity late in the season, Viljoen realises that the associations have a process that they have to follow."
The bowling-allrounder has been interviewed by three associations now regarding plans for 2015-16, and Bannister said he is confident the 27-year-old will secure a contract.
"He has a preference to where he wants to be based, however he will look at what offers come across the table over the next few months and go from there.
"[I'm] hopeful to have him back in Wanganui ... that's a long shot if he is based outside of the Central Districts region.
"So there are plans in place to have two other pros in the city next season, adding strength to the premier club scene as well as the senior men's rep side."
Viljoen will visit family in South Africa before fulfilling the fourth year of his contract with the Blackpool club in Lancashire, competing in the Northern League competition.