GU01250830 is the number I have seen was the quoted as being the last original ones that crossed over when 98 was superceded, please feel free to correct me if I have missed a bit and got it wrong
Getting to the point of building a furnace and a sand box, plenty of casings around, if I could get some decent shots of a lever off the bike and a few measurements and try transfer the jpg images to cad or dwg