Transmitter Sticks for fatter fingers

[Dan the Man]

Being that everytime I see a photo of racing in the UK, 75% of the drivers are using stick radios, I thought I'd ask here

I find the sticks on my Hitec Eclipse are too small in diametre/width for me to have a lot of control. I've tried using those grips they give small kids for their pens, but apparently somewhere out there are larger sticks that you can buy.

Any advice on if these mysterious things exist, and if so, where they can be bought would be appreciated!