Sources for Verbal-guise Test

I am currently conducting a science research on language attitudes towards different English accents. The method I chose is Verbal-guise Test. To be specific, I need to present participants with audio recordings of different speakers with little difference using the target accents in their habitual behavior and have them rate the recordings based on certain criteria.

The problem is that I lack sources to use as guise (the audio recordings) for this VGT. Do you guys have any suggestions on sources of recordings of different accents or any replacements for my test? Please help me if you know anything useful. Thank you!