thank you all for the replies so far, much appreciated.
My plan/thinking was also custom make as ChrF suggested. I was thinking of having side plates bent/manufactured to bolt to my roof rack and at a slight angle to hopefully bring the bars in a little. I was thinking to make the brackets in a way to have the roof bike rack bolted on as well for easy mounting etc.
I will be going to aocmpany called Vectitec who do custome metal work, hopefully they can also suggest some ideas.
When i get it done i will be sure to share some pics and information with you all.