Been looking for a while and ordered this the other day receiving two days later..
The box is made by a Thule company and retail for £130 at Tesco.com with good reviews (http://direct.tesco.com/q/R.204-1271.aspx?utm_source=GoogleShopping&utm_medium=GSF_NormalFeed&utm_campaign=GSF_TescoDirect&utm_content=204-1271).
Cruz bars get a great write up from a few forums including folk lugging Canoes around. I bought the standard bar but you can go for the alu aeros for a few quid more. Bars are normally £55 on their own. However, you will always need to buy the T Slot adaptors for any fittings you buy (bike racks etc)
Be warned the roofbox is huge! but you get a free roof hoist with the order.
Roof box and bars PACKAGE: Package deal: Karrite 320 roof box and CRUZ bars, box no. KR320 £139.85 £139.85
Free box hoist: Fasty BOX HOIST - Roof Box Company (Price inclusive)
CRUZ steel roof bars: CRUZ 115cm lockable roof bars (2) no. OT-115 (921001) (Price inclusive)
CRUZ roof bars fitting kit: CRUZ roof bars adapter kit no. CR1432 (931432) (Price inclusive)
Free HANDY strap: Free Fasty 200cm HANDY strap 340kg no. FS200-OFFER (Price inclusive
Total including VAT at 20% : £139.85 + £9.90 Delv