Compact interface for 4 channel DJ mixer

Hi everyone,
I love my Model 1 (and have a rotary as well, so DSUB is out) and would love a small interface to run all 4 stereo channels through. Is there anything smaller or less expensive that the RME UCX II or is that pretty much the best option i’m going to find?

Use case is analog mixer and Traktor for some fun relaxing times.