Before the Dallape factory closed Roland sampled their instruments - historic and contemporary I believe.
I emailed "Sud-Claviers" in France who say these sounds are available as an add-on but only on FR8X and FR3X.
I haven't found anything about diatonics (ie melodeon) sounds. I find this a bit surprising because instrument makers from Hohner to the boutique builders are doing cba with diatonic "feel"
Perhaps it'll come with time.
On the subject of support, I bought a FR1X instructional dvd from Sud-claviers.
It arrived today and would be really (well a bit) useful if I wasn't able to read the manual.
I was surprised because they did a youtube review of the box which was not bad at all.