"Somewhere like a church, community or school hall would be ideal."
Mrs Johnston said they did not want to change the days they came to Rotorua, as that would affect the wider scheduling in other centres and create a "logistical nightmare".
She did not want to contemplate what would happen if they did not find somewhere soon.
"We will just have to find somewhere, no two ways about it. We would rather do it sooner for ease of donors knowing where we are going to be. We want to make sure we're not putting them out and we don't want to keep mucking them around."
Mrs Johnston said they had been busy checking out suggested facilities but were interested in hearing from anyone.
She said they were a not-for-profit organisation but could pay if need be.
Mrs Johnston can be contacted on (07) 839 9630.