I've been playing quite a bit now on my new Fanatec Carrera wheel, and having no shifter paddles does get quite frustrating.....so this led to me making my own ones 
They work really well, and they're made out of acrylic, so it's very rigid. I applied 3M Carbon Fibre vinyl to them in the end as well.

I could upload the dimensions, template e.t.c. if anyone's interested.
They work really well, and they're made out of acrylic, so it's very rigid. I applied 3M Carbon Fibre vinyl to them in the end as well.

I could upload the dimensions, template e.t.c. if anyone's interested.