I'm in a similar position (I need to carry a 3-section ladder occasionally) and have been looking at the options so let me share my findings:
Thule do bars and 'feet' (you'll need both). There's only one foot that fits the raised rails we have on the Berlingo Mk3: this will be the 775, about £90 from Halfords (there are cheaper vendors).
However, there's a choice of bars. If you're only ever going to use these with a roofbox and remove them for the remaining time, I wouldn't bother with their super-aerodynamic Wingbar (you'll have a stonking great roof box destroying your fuel-efficiency anyway!) but if you plan to leave the bars in place for longer, the Wingbar is a better bet....sometimes!
Plain square bar: £40-odd.
HOWEVER: I take issue with the Wingbar. It's sold to us as an aerodynamic solution, clearly the ideal thing if you're an occasional ladder-carrier, weekend DIYer or so on who might want to leave the bars on all the time. The only trouble is, the ONLY thing you can get from Thule for the Wingbar is a mounting kit for a roofbox - there's no ladder-stops, bike carriers or any of the other useful kit that's available for their un-aerodynamic square bars!
Don't go third-party either: I've had a Wingbar for my old car for four years and I've been unable to find a single ladder hook that fits the Wingbar either - so ladders have to be strapped on with lengths of rope (time-consuming & messy).
In summary, if you want to use your bars for anything other than a roofbox, don't use their fuel-efficient bar! Shame on you Thule and my old pair are sitting in the garage, complete with their 754 feet, awaiting someone with more money than sense
The alternative is to have a look at the less-well known brands. I've found some 'round but flattened' bars, complete with foot for £50 and a square bar with foot for £39 on Ebay (car accessories / travel / roof racks --> select make and model of car. Both seem ideal for the occasional roofbox-carrier, the only real difference being finish: box-sections are usually black steel while the oval bars are usually aluminium and will look better.
Be aware that some of these third-party bars come in two lengths: 120 and 135cm. I'm about to place an order for square 135cm bars that are steel box section so I'll be able to cut them down to remove the 'overhang' and neaten things up a bit - you can't do with with the aluminium oval bars. The 120cm bars SHOULD fit but I'll get the longer ones and trim...I'm happy to take measurements of my final result and let you know if the 120's would do.
Good luck and I hope this helps.
(21-03-2014, 07:13 PM)finny Wrote: try the thule website or ebay, thule you can swap the ends to fit other cars so you save money not keep buying bars, sell my old ends on ebay easily
...Except that we can buy a shiny new pair of bars complete with the correct feet for substantially less than the price Thule want just for a new foot