Well, unfortunately Space Elves or Eldar are still struggling for models in 2017, though there are rumours of new troops from GW later this year! There are a few great third party alternatives for a few units though!
Iona Starkiller – Farseer alternative
From HF Minis
Space Elves Bikes Unit – Jet bikes alternative
Spellcrow also offer conversion Eldar heads, biker torsos, and defence line parts
Warp Stalkers Unit – Howling Banshees alternative
Chapter House also do conversion kits for Farseer and Warlock jetbikes from GW standard jet bikes.
Light Side Arahnide – Warp Spiders alternative
From Wargame Exclusive