This roof rack has recently been removed from a SWB transit.
Looking at the Prime Design website it appears to be over £600 new.
All rails are very adjustable as is the position of the fixing brackets.
Looking online, it seems that a new rack would come with tracking that can be fitted direct to the van roof and then the brackets slot in to it but this rack was bolted direct to our van roof when we bought it.
It's a very smart, well made rack that will not deteriorate as it's all aluminium.