Hey John, Rogans brother here. The tube set we have is the original one and seems to be in good shape. Your best bet would first be to contact Zodiac and see if the original plans/ dimensions are available from them. You might be able to have the tubes made by Zodiac but that will be very expensive.
There are a few companies who do retubing in the US but they will need the dimensions of the tubes for an estimate. Pathalla, A member on the forum had a tube set made here in the states by Demaree inflatable boats (http://dibboats.com/
). This was a very large tube set and Im not sure if they would make tubes for a 4 meter boat but it might be worth a shot. Also since the tubes are not that heavy you might want to consider having them made in the UK. I believe Henshaws does some quality work for reasonable prices and shipping shouldn't be too much. Let us know if you need any help, Hurricanes are great boats.
I put "Smart Tabs" on our Hurricane and it completely stopped issues with chine walkin. The boat also gets onto plane much much quicker. Great product.