Hey Neandergeek, cool you got one.  Good luck with the LED mod if you attempt it.  I wonder what color (yes there is a 'u' missing there you UK lot) LED you will choose. 

Yes, I'm waiting on the USB cable as well. It seems the UNI-T ut7xx series has come out. The new series seem to be targeting the Fluke 289 type data logging meters.  But, as soon as they came out the price of the USB cable seemed to jump from ~$11 to ~$18.  Well, there is one on its way to me now. It should be here soon. 

In the mean time, I can confirm that the UNI-T windows software does work with Linux/WINE.  I just need the cable to make sure they can communicate.  

As for the small curved containers, I've had them for ~20 years.  They are from a storage bucket type thing I had for work.  It was a 5 gallon plastic bucket with stackable trays inside.  Similar to this:

https://tinyurl.com/nhfr2do

The small bins would stack into one of the bigger trays for holding tiny stuff.  But, they were too small for work items. So, I used them for electronics parts at home.  So no, I don't think they are available on their own.  