Finally I've found a juban with sleeves long enough for my black-pink komon!
And I've also bought some more accessoires:
2 Hakata silk datejime
an eri sugata collar, or easy collar
an obi-clip, always handy
a set of 2 eri shin, 3 koshi himo, an obi-makura, an obi-ita with straps and a kohrin-belt
and last but not least a pink obiage & obijime set to go with the same black-pink komon.