Hello Visualex
Thanks for your questions.
1) Yes, the matching filters for the j series are those of the e and i series. Here is the direct link to the filters;
iRobot Filter Set (3-piece)2) The suction station will soon be available for purchase separately and will then be compatible with the Roomba j7. The same principle as with the i-Series, for example, where the suction station can also be purchased at a later date.
If you have any further questions, please do not hesitate to contact us.
Best regards,
Your iRobot Team