I've been thinking of trying
Highland Lilac too; here is its website. They sell samples:
http://www.highlandlilac.com/
As for LOTV, it has long been one of my favorite scents, but the best ones (IMO) have been reformulated to their detriment. I'm going to suggest you try Molinard's Les Fleurs de Provence
Lily of the Valley (a.k.a.
Muguet).
There are a number of other LOTV scents out there by Floris, Penhaligon's, Annick Goutal (
Le Muguet), Crabtree & Evelyn, Taylor of London (their LOTV cologne ice stick is nicer than the spray), Woods of Windsor and Yardley.
Jessica McClintock also has a strong muguet note.
Edit much later for anyone looking for yet another Lilac scent: I bought Demeter
Lilac at CVS yesterday and it is really nice! I still think
Highland Lilac of Rochester is better, but this one is quite good and it's $5.99 for the 15 ml. purse size (it's $10.00 on the Demeter website.)
Another later edit: For anyone who may read this thread, I did want to update on Demeter. The one to try is the Demeter Lilac cologne,
not the Demeter Naturals 100% Natural Lilac eau de toilette, which doesn't smell like lilac in the least.