ANything available for 24 inch LCD ?

These are the biggest I've seen and will just cover 23.1" (at absolute max!!), dunno how good they'd be for a 24"....
http://www.evergreen-henan.com/Fresnel Lens.htm
HR1002
HR1003

You'll then have to source a triplet that'll handle that huge size and is matched to the fresnels,
http://cgi.ebay.ie/Cooke-process-lens-Series-VA_W0QQitemZ7538864757QQcategoryZ30076QQcmdZViewItem
A process lens like that may help, it can handle 16" x 20" (which is actually 20" x 20" because the lens isn't rectangular).