Have you thought of something like this:
http://www.rmweb.co.uk/community/uploads/monthly_05_2014/post-7104-0-10521700-1399740317.jpg
This is how my friend Mike has done it on his layout Dunelm, it's on here somewhere, I'm sure he would be more than happy to tell you more
Doug
Edit, just realised I should have put this in Barnabys thread, apologies to Chris for hijacking