I am after the same, but the only one clearly advertised as tested and working with TD2 is Simore Platinum.
not allowed to provide link to simore.eu
At 70 euros it's far too expensive to justify at the moment, especially as we still only have their word for it.
Apparently as phones only have one transmitter/receiver it is not possible to receive calls from 2x active Sims. Their workaround is to have an automatic setting where the SIMS auto-switch, so you can get notified of any missed calls, or SMSes. In reality the workaround for dual lines is to auto-divert the calls for the unused sim to the active one, leaving the auto-switch to pick up SMS from the other SIM to a schedule.