Hi from Australia.
I'm the author and presenter of the "Grey Nomad 101" DVD series on Australian caravanning - over 35 hours altogether.
My mild, professional Australian accent could be the perfect choice for your documentaries.
My normal rate for 1000 words on a once-off basis would be around $110.
However, for repeat business like yours, it would come right down to less than half that. For 10 recordings averaging 1000 words, probably looking at around $480 all together.
But please let me have a look at the scripts first, and I'll finalise my bid for you.
Check profile and portfolio samples, and let me know if you need further info or samples.
Cheers
Sid