The interim bail has been granted by court and not by the lawyer.
Hence it cannot be cancelled just becasue you changed the lawyer.
If the lawyer refuses to to handover the copy of the interim bail, you as a party, can file a copy application seeking copy of the order by yourself, there is no restriction to supply the copy of the order o the petitioner by proving satisfactory evidence to his identity before the court.
You can also send a written representation/complaint to the bar association where this advocate belongs seeking its intervention against his atrocious demands.