I'm looking for a lipid like DOTAP or DOPE that is already attached to a fluorescent probe that emits in the far red. Another lipid can be good if is a neutral lipid.
Where do you want your probe, in the headgroup or in the methyl chain? In any case, Molecular Probes/Invitrogen will have something you can use.They also have a very nice software that shows the excitation and emission spectra of any of their probes.