Send the Owners Corp/Strata Manager a bill for the damages, with a reasonable time for them to pay (say, two weeks).
State on the claim letter that the Insurer has said they would have paid for this, but for the excess which should be covered by the owners corp. (If you can get this in writing, even in an email from the insurer, that will strengthen your case).
Tell the strata manager that if they fail to pay within the 14 days, you will be pursuing the matter at the small claims court, where you will also be seeking costs.
You might also point out that, under strata law, they will not be able to charge you for any proportion of those costs incurred.
Regarding the small claims court, here is a very helpful fact sheet from the LawAccess website that explains the whole process.