Seeking slip ring

I'm building a sculpture that includes a rotating 14" 2-lb ceramic disc covered in LED's. I have a 30RPM high-torque geared DC motor that is perfect for this, connected to a motor controller shield. I need a slip ring to get power and 3 control signals to the disc. Adafruit makes a little slip ring, but it has 2 problems - the part is too small (only 2 cm across and light-weight plastic), and there's no way to mount it on the motor shaft (which is 6mm dia, flattened). Can someone point me to a part that will work for me? Thanks!

ebay

https://www.ebay.com/itm/WIND-GENERATOR-SLIP-RING-6-WIRE-180-AMP-30-AMP-PER-CONDUCTOR-WIRE/271652086953?hash=item3f3fb9e4a9:g:r6kAAOSwp0pazn1B

If the OP can be patient for delivery then Aliexpress can save them more money

“ @larryd The question mark and everything after that is YOUR personal browsing data. Maybe best to remove that.”

Thanks @Wawa