I have started seeing some agents advertising business visas as a way to get into Indonesia. It seems like a possible way if you don’t have a KITAS.
I don’t know the exact details but it seems like you need a sponsor. You can use an agent or contact your local Indonesian embassy/consulate to see if they can assist. (Some seem better than others)
You can try this here also: https://visa-online.imigrasi.go.id/index.xhtml
