While we don't yet have a dedicated case for the LinnDrum LM-2, we have our UNISON Custom Edition Cases available.
The dimensions we have on hand for the LinnDrum LM-2 are: (22 x 11.8 x 4.13) inches. If they align with what you have, we would recommend looking at the Custom Edition: XL, dimensions: (24.5 x 13.5 x 4.25) inches.
The UNISON cases have pick and pluck foam where you will be able to custom mold the foam to securely fit your LinnDrum LM-2.