Andy,
Thanks for the link

I keep forgetting about Technobots selling stuff like that..( I bought some caps from them not so long back too....

)
Their prices arent too bad except I can get a pair of gears from RDG cheaper if I had to spend...( tight northern monkey..

)
As luck would have it, I have two 30 tooth gears from my lathe that will do nicely.....
Oh, Joe.....

I guess I ought to have known better that it wouldnt be easy.. (grrr...)
I guess I'm going to have a rethink on this..
I can get a 12 in roller for £100 or can buy a kit from Hemingway kits for £107 plus carr but that is only 10 inch wide...or I can pursue my dream and build one for less....that would be 12 inch across...
Choice, choices choices......