yea.maybe u can try guitar effect bags for yr micro korg or micro X.
I am using a Zoom guitar effect bag for my 2 octave Xiosynth. fits perfectly leh....so happi..
simply just hunt for guitar effect bags on the net. u will find that most of the dimensions are quite close to a 2-3 octave synth. Ask yr guitarist frends!!!! boss and line 6 have quite a few models of bags...
try not to search within the keyboard accessory range for what u want , as we are a rare breed, our k.board accessories are even rarer.the microkorg has a official korg hardcase and softcase but its prob only avail in japan unless u waana order via japanese webbies/vpostJapan.
Yamaha at plaza sing also have a Gator soft sling bag that can fit 2-3 octave synths. but i tink its a littleeeeeee big for the microkorg.abit too long maybe. ...or maybe i just dun like the silly alligator logo...
i found the perfect slinging soft case for my kx5 keytar by using a $20 camera tripod stand case.
the tomb tone guitar pedal soft case fits 2 octave synths nicely too...
also.theres a music shop i tink in paradiz center that used to sell softcases for 4 octaves keyboards. tats quite a rare size. if ever in future u have a nord or any 4 octave controller/synth... can check out this shop at level 2-3 i tink...next to by left.