Bus/ Taxi from Aachen to Dusseldorf Airport

Hi everyone,

Does anyone know if there are shuttle buses / taxi going from Aachen to Dusseldorf Airport?

I read somewhere that this company: Protected content has a shuttle bus service, but I cant find more information about it.

I know I can take the regional train, but I prefer having one direct bus ( and not carrying heavy bag everywhere)

Thanks in advance,
Mini