I have an Arcadia 3ft T8 light unit that i used on my Juwel Rio 180. Its currently sat in my mums garage because i can't be bothered to pack and sell it. This might just the the motivation i need to do so. £30 + whatever postage will be (i'll look into it) and its yours if its suitable. It's in good condition and works fine. Tubes have life in them, don't know how old they are but both work. Cover glass on it will just need a little polish and it'll be fine.
Drop me a pm if interested as i probably won't remember this thread.
James