Well blow me down Rick - I too have an old Relium Canaria with a fractured frame piece on one of the cross joints. I would be interested to know how you get on. We have just bought a Sunncamp Vario 4 (2005) and had a great time in Norfolk last weekend but the Relium holds a very dear place in my heart.
Most large camping shops carry a supply of spare poles, some with joints on too. You need to take the fractured pole with you to make sure you buy the correct size - there are two different diameters. Don't worry if you find one which is a bit too long, they cut down really easy. Our local camping store charges £1 per pole.
We had the same problem with our Relium super 7k, i contacted the manufactures but they could not help due to the age of tent so i ended up getting some steel tube of the right diameter & welding new sections up to replace the bent bits