Riga Cathedral for GrandOrgue

How do I model the Riga Cathedral Organ in GrandOrgue? I need at least Doesburg and Buckow-Rieger, but what other samplesets do I need? Bergen op Zoom, possibly?

The specifications are here:

The organ of Riga Dom Cathedral (music.lv)

The following stops are free reed: I 16' Contrafagott and 8' Euphon; II 16' Aeolodicon, 8' Fagott-Oboe, and 4' Oboe; III 8' Basson and Clarinette; IV 8' Physharmonika; and P2 16' Serpent and 8' Bassethorn.

Update: I need at least SP Doesburg (the demo, at least) and AVO Buckow-Rieger, SP Utrecht Demo, and possibly PG Swieta Lipka (the demo, at least, possibly the full version?).

II 8' Ophicleide is also a free reed.