Multilayer PCB Replication

I need an experienced PCB designer to replicate a multilayer consumer electronics board based on existing schematics. The board is used in a radio device and involves complex signal processing.

Key Requirements:
- Accurate replication of the existing PCB.
- Maintain all signal processing functions.
- Ability to work with obsolete designs.

Ideal Skills:
- Expertise in multilayer PCB design.
- Strong background in signal processing circuits.
- Experience with outdated technology and schematics.

Please provide samples of similar work and estimated timelines.