There's a new and very extensive webpage of the English language in Ireland (and I would much like to see something similar about Irish). All in all a pretty interesting page. What might interest you in particular is the rather short section on Irish, containing recordings of phrases from six places in the Gaeltacht:

North-West Donegal
South-West Donegal
Conamara, Co. Galway
Dingle Peninsula, Co. Kerry
Iveragh Peninsula, Co. Kerry
Ring, Co. Waterford

Of course it could be improved. More recordings would be interesting, especially from Mayo and from Cork. Unfortunately, the speaker from Dingle isn't a speaker I would have picked. Still, I found it quite a nice page.

http://www.uni-essen.de/IERC/

There's a product at Litríocht called "Gaschaint" which features a handbook of 2000 phrases, shown in English and then in Ulster Irish, Connacht Irish and Munster Irish. In addition to the nicely colour-coded handbook, there are two CDs for each dialect, whose colour matches the colour used in the book for that dialect.

It doesn't go so far as to give equivalents in each sub-dialect, but does feature two speakers per dialect, for variety.

http://www.litriocht.com/shop/product_info.php?manufacturers_id=&products_id=388 3

"By the end of the Middle Irish period there is no distinction between genitive and dative with most nouns"

So was the genetive reanalysed by speakers and remade in due course?

The statement is wrong. It is with the nominative that dative merged, not with genitive. So, if the statement is wrong, there is no point in analysing it.