Thanks Davehouck,
I'll try to contact Alembic for the pick up selector.
In the meantime, I've placed an order for the pointer knob and also some control knobs since 1 month but still have no news about when will this order be picked and products shipped to me (though several emais sent to Alembic). I'll try to give a call next week.
Thanks again. REgards. Franck