http://www.dakkadakka.com/dakkaforum/posts/list/8.page JForum - http://www.jforum.net
EDIT:

These look pretty convincing.
http://www.manticgames.com/mantic-shop/warpath/gcps/product/gcps-faction-starter.html]]> http://www.dakkadakka.com/dakkaforum/posts/preList/740915/9626046.page http://www.dakkadakka.com/dakkaforum/posts/preList/740915/9626046.page GMT IIRC Scions are more expensive than Elysians. I like them, but unless you’re digging the cuirass, I wouldn’t particularly recommend them.

Saw this thread recently, maybe it can help inspire you. FWIW my guard also use a headswap with a few additional bits.
https://www.dakkadakka.com/dakkaforum/posts/list/737392.page
There’s also Harakoni Warhawks if you have a hard time making a regiment from scratch.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/740915/9627478.page http://www.dakkadakka.com/dakkaforum/posts/preList/740915/9627478.page GMT IMO. They're also more realistically/thinner proportioned than GW guardsmen plastic, and thus more in line with the FW elysian models.

You can buy grav-chute packs separately from FW too https://www.forgeworld.co.uk/en-GB/Grav-Chute-Pack-of-10

Also, check out anvil miniatures. I'm sure there's bits there to put together something with a elysian feel.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/740915/9627492.page http://www.dakkadakka.com/dakkaforum/posts/preList/740915/9627492.page GMT http://www.dakkadakka.com/dakkaforum/posts/preList/740915/9627893.page http://www.dakkadakka.com/dakkaforum/posts/preList/740915/9627893.page GMT http://www.dakkadakka.com/dakkaforum/posts/preList/740915/9628084.page http://www.dakkadakka.com/dakkaforum/posts/preList/740915/9628084.page GMT