Thing like holepunches, a4 lined paper are available in Indonesia. Same for fresh milk you can get it at most large supermarkets. The best milk is the greenfield brand if not then indomilk but it doesn't taste as nice and goes off quicker. Not sure about English tea as I'm not a tea drinker. One thing I haven't been able to find in Jakarta (found no problem in Medan) is marmite which I bring a stock of. Another is oxo cubes. If you are in a smaller city it's hard to find non sweet bread so if you use a bread maker you could bring some bread mix if you wanted. Think you are female from your nic so I'll add tampons are expensive here and not always easy to find in smaller cities. To be honest you can find most things you need in a reasonable sized city in Indonesia.