Try facebook for these type of inquiries using the name of the people you are looking for.
If it is just a photo of St. Catherine you can try 'flicker' as many people have posted photo's.
I did find pictures of the inside and outside of the church "Bernard Healy' photo's:www.flickr.com/photos/bernardhealy
(IMG_3829-Flickr) or trywww.flicker.com/photos/bernardhealy/4269897656/in/photostrea...www.igp-web.com
+ county (photo's and cemetary inscriptions)
St. Catherine's, Ventry information is mostly in gaelic. However, they give an address to contact the church about genealogy after 1900. Notes - no direct access to parish records, include a donation.
Dingle Parish website: www.naomhmuire.wordpress.com
St. Catherine's, Ventry (they are on facebook)
The Parish Archives
Tigh na Sagart
Sra'id an Doirin
Prior to 1900 look for parish records on www.irishgenealogy.ie
You can also look for the telephone numbers and address on the website of the
telephone directory to see what family names are still in the vicinity and perhaps they would likely be more receptive to taking photo's. I didn't find a reference in Flicker to St. Catherine