apparently theres been issues with recon boxes in recent years.. If rumours are true, exchane boxes are been shipped off to european countries where labour is cheap, and quality control is somewhat lacking.. apparently rubbers get changed, but bushes dont.. and obviously this leads to premature failure.
You get what you pay for.. on the whole, but i'd certainley look for local ccompanies who may be able to do it for you, and offer a face to face warrenty.
Also how bad is it? 99.9% of landys have some seepage from the box - mine got to doing about 1ltre a month! (left "blood" trails in the snow to confuse local kids! hehe)