Firstly I should explain that here in Thailand I am at the end of the supply chain
I can also vouch for the tubing fix. I have used the outside of a ballpoint pen. If you find a tapered pen you can cut the piece that is the correct diameter. Office mate has these.

I have also used the yellow plastic tubing that comes with party balloon sticks.
Sorry its a bit large ( the picture not the tubing) but they are called cups and sticks
