I'd like to thank John Harrison for sending me a link to these on Aliexpress. I've not had much luck getting stuff sent from AE to the Isle of Man so I checked for them on eBay and found that HMRC (UK tax) was blocking some Chinese sellers from shipping to the UK.
I finally found some sellers shipping to the UK so I bought a couple from different sellers to be on the safe side.
They both arrived together, and here's a demo and a teardown.

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