Canon Flash users

I currently have a Canon 430iii-RT flash and now need a transmitter for off-camera flash work. How much more will I benefit from a Canon ST-E3 Tx than another Canon 430iii-RT as the master? I would like to experiment with 2nd curtain flash in the future as well.

Affordable sources for Flags/Cutters/Floppies/Scrims/Frames?

Am looking for sources for frugal Flags/Cutters/Floppies/Scrims/Frames? Unfortunately as I live so far from the USA, buying from B&H etc is prohibitively expensive due simply to shipping costs.

Can anybody find these elsewhere such as direct from China from Aliexpress? (or eBay) I've successfully purchased C stands from Aliexpress,...