I get Festo fittings from a supplier locally to me, and the Norgren ones directly from their website, but it's best to request a catalogue from them to see what they do:-
http://www.festo.com
and:-
http://www.norgren.com/uk/
Note: You must use the correct type of tube with push fits, vinyl will not do without inserts. I use transparent reforming polyurethane made by festo.