Thanks everyone , I knew you guys would appreciate it
I've been thinking of how I could make them up cost effectively
The materials were cheap I just used some aluminum I had lying around, it started off like this
I traced the charcoal grate onto a sheet of aluminum , traced another line about an inch wider, cut it out with an angle grinder , I kept on cutting down until I had a perfect fit on top of the grate, work out where your basket is going to sit and cut the circle down
I then bought a couple of meters of flat aluminum about an inch wide
Now comes the expensive part...... Getting it welded on
There are no bends its just inch wide aluminum welded on
I used aluminum because its cheaper, easier to work with and a lot easier to clean
I've tried it on high heat cooks and low and slow and it doesn't seem to effect the metal
It was really easy to make and having the deflector on the charcoal grate has made a huge difference to the amount of heat produced, the convection effect inside the kettle,easier temp control, the amount of fuel used and the consistency of cooking on the grate
Combined with the vertical deflector they have given me so much more cooking area with no worries about direct heat
I also made up a special deflector plate to use with the roti ring that works a treat if you like that true charcoal flavour
Not sure if I've already posted that one somewhere