Short of buying a used 202T for spares from e-Bay, has anyone any
suggestions where I might get a replacement?

Seaching Google for acer laptop spares yields 12,900 hits from the UK.

Not a very helpful reply. Laptop spares are available but it's a
closed market with little third party interest (it's nothing like the
desktop PC marketplace). A small number of companies offer to repair
laptops around the UK - that would certainly be a better Google search.
However, they mostly offer to fix "standard" problems like damaged screens
or the notebook refusing to power-up. However, they might offer you some
advice if you phoned.

So, in other words, yes, getting a used model from eBay is probably the
quickest and cheapest option.

ps Using Google properly and searching for "acer laptop spares"
(surrounded in quotes) brings up eight results, one of which you might
find interesting: http://www.laptopsolutions.plc.uk/Ac...top_spares.htm