Dear Ben,
I am Tania, 26, native Spanish Speaker from central Spain so I have the "neutral" spanish accent. I have been practising English all my live, I have lived abroad and I am certified in Advanced English (C1 level by Cambridge University) since 2012. I think I have a pretty good standard English accent.
My home is located in a peacefull village so the noise will bor be a problem and the quality of the recordings will be good.
I wouldn't mind to record some samples for you.
Please, open the chat so we can discuss more about the project and budget
Regards