The Technomate TM1000D is good, I've used it for downlinking IRN. You should be able to pick it up for approx 100 quid.

http://www.technomate.com/products2.php

The Humax F2-FOX is highly recommended, my mate has installed loads of them, 100 quid too.

http://www.international-satellite.com/items/humax_f2-fox.html
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Cheers,

Andy M