While we don't yet have a dedicated case for the 4ms Pod48X, one of the cases in our PULSE line may be a good fit!
The dimensions we have on hand for the 4ms Pod48X are: (9.78 x 6.28 x 2.08) inches. If that aligns with what you have, we would recommend looking at the PULSE CASE FOR ELEKTRON DIGITAKT OR DIGITONE: 10.25 x 7.25 x 2.75 inches.