Hi Arron!
I am a music producer based in Sale, Manchester and I think I can help you. I have a lot of experience working with vocal artists, putting their vocals to pre-recorded music and delivering a professional final product. Being a singer myself, whilst working with vocal artists I am able to offer my advice on melody, intonation, harmonies etc. The genre I work in mostly is soft rock/acoustic music, so I believe this will be applicable to the vibe you're after.
I have all the equipment needed for recording, so if it made it easier for you, I would be willing to bring my setup to your location day by day and record there, then I would be able to do all the editing, mixing and mastering at home as well. This would avoid and extra recording studio fees.
I have put the project to be delivered in 10 days as I feel that would be more than enough time to get all the vocals recorded to a point that you are happy with and for me to mix the song to a professional standard.
As far as I can see the song you have purchased has not been attached here but that's something we can sort out later if you were to choose me. It would also be useful if you were to send some rough recordings of yourself singing so I'd be able to get a feel for what areas I'd be able to offer my advice in.
Any further questions please feel free to let me know!
Cheers
Matt