Thanks for your query at DoctorSpring.
I can understand your concern.
I would recommend that you try solutions like salactin, duofilm etc which contain salicylic acid and lactic acid.
You can apply it at night daily only on the warts and not on the surrounding area.
However, I suggest that you follow up with your dermatologist while you are applying the solution so that he can monitor the progress and keep check for any side effects.
Regarding cryosurgery, I will not be able to recommend any particular doctor, however it would be better to go to an institute where they would be able to give cryotherapy effectively.
Please let me know if you have any queries.