Audio Recording for an English Lang Book by Native Speakers

Hello, I am creating an English Language book for my college. They have some audio scripts that needed to be recorded professionally by Native speakers or near Native speakers. What I will provide: 1. Real example 2. and transcripts to be recorded as in the example. 3. The project needs some voices not one. As there will be conversations between people. I don't have any exact amount as all will be depended on the minutes I will need. There are six books so I will have a lot of audios. It will be as I design so there will be no rush))) Preferably with clear British English. I will require one sample after your bid. So if you won't do the sample, please don't apply as audio needs to have a sample to see quality before I hire.