Merv,
Mine were made through Warwick and am very happy with them. It would be a benefit if you specify what length you would like them to be be as I thought mine were a tad short (my chassis is also 100mm longer) but I don't notice it anymore. The attachment plate is a short length of wide aluminium angle - the front two tubes accept a threaded bolt and the bracket is attached with bolts into the front wheel arch. I have attached the example photos from Warwick but the brackets came with a better finish than shown. The use of spacers allow you to position the pipes where you want them. I allowed a bit of room between the side of the body and the pipes so that small stones can fall through but some of the larger ones get caught.
Derek