Call/check with a nearby American Tourister/Samsonite luggage outlet store to see if they have replacement garment bag hangers - as I recalled seeing them (not shown on their website) as it shouldn't be priced higher than those on eBay or Amazon.

The plastic ones from Target/Walmart stores might also work for OP - we packed several on cruises to hang things up and just leave them behind to be "recycled" with the stateroom steward.