I've seen douga a couple of times;  it's never 
been very good, so I never bought any -- it was 
below my standards for douga.

These things seem to some in bursts (e.g., 
there's been a flood of new AMG Movie cels for 
the last 6 months).  I'm hoping that the 
floodgates will open for Love Hina douga one of 
these days.