Having gone full circle on this I’ll answer your original question.
Generally its almost impossible to get a copy of the “standard” strata manager contract.
SCA has a copyright on their original contract and its only members of SCA who can access and use the standard contract.
There are other organisations providing contracts for strata managers (I know for example that one of the major strata lawyers in Sydney provides such contract forms to strata managers who subscribe to their services)
Also in my experience over the last 15 years of strata, I have never seen two strata management contracts that even remotely look the same (The intent is common, but the way its laid out is always different) That suggests to me that strata managers source their contract templates from many providers.
As JT suggested, negotiate the contract with your strata manager
The other thing in your favour is that the former contract has expired. I cant say for Victoria, but in NSW once the contract has expired, its expired. It can be extended for 3 months by the committee but thats all.
What I am getting at is thats in the strata managers interest to get a new contract signed before they cant do any more work for you. That puts you in a good bargaining position. (Remember you can always self manage for a time until a new strata manager is found)