Thanks for the offer! I spotted this on ebay the other night so will probably order some up.I've probably got some cable the right diameter and long enough in my scrap body loom. They won't be the same colours, but it should do the job. I'm all packed up for a house move at the moment, but after I've got all my stuff over I'll have a look if you want.
I haven't got the additional light yet but see there are some also being sold on eBay as replacements/brighter upgrades.
Good luck with the house move