Searchable image gallery and digital download shop

Hi,

I am looking for an image gallery for wordpress that is searchable and you are able to sell digital downloads of photos from.

I’d like to search the gallery by the img number file name created by the digital camera when a photo is taken, and then be able to sell the images by digital download. I don’t want to have to manually tag images with their file names.

After searching I’ve found that someone has developed a shop plugin offering digital downloads for the nextgen gallery but it doesn’t seem to be searchable!

Can anyone help?