"And we're planning to accumulate that lump of money.
"For the sake of the animals, I really hope it's only a temporary closure but, in the meantime, we're going to do everything we can."
Assistant manager Ross Nixon added: "The centre's not closing if we've got anything to do with it."
Ms Harlick, who started volunteering with the SPCA as a dog walker four years ago, was "shocked" to hear of the centre's closure.
"It's been quite disappointing to hear about all the politics and egos involved - it should be about the animals.
"And, honestly, I'm not sure why they didn't appeal for financial help sooner - charities have to be proactive these days."
She said trade at the op-shop had been quieter in the wake of the controversy surrounding former manager Lloyd Warren, who was suspended last year.
But it had nevertheless remained profitable, raising $70,000 in 2014 alone, and retaining a loyal following.
With the centre closing, the foot traffic has continued - despite initial concern from the public.
"We've had people come in, and say, 'oh my gosh, you're not closing, too, are you?'" Ms Harlick said.