Iirc repeaters tend to be tied to the router, eg if you have a Linksys router you need a Linksys repeater. Safecom/Ebuyer, afaik, don't sell a compatible repeater and if they did it would probably be more than the £30 router!
__________________
Just had a look on Broadbandbuyer and they have a selection of replacement antenna which might do the trick:
http://www.broadbandbuyer.co.uk/Shop...upID=3&Alt=Yes