Welcome to Librarium Online!
Hey, I just found a link on the GW site to the harlequins codex and these guys look awesome. I was just wondering what do you use for models? eldar or dark eldar? and which models specifically do you use for characters like the solitare?
They sell the models (or at least, have pictures of them; you can find them easily on eBay) in the GW Classic & Collector's section, I believe, of the online store.
However, personally, I would convert both Dark and normal Eldar (as long as I could make them look semi-similar), however if I had to choose, I'd use the Dark Eldar Wyches for Harlequins. Just cut off some of the spikier pieces and use green stuff for masks/cloth/etc.
I am going to be crafting my own miniatures for my 2000 point Harlequin army.