I LITERALLY just replied to your comment on OTS' submission of my Kaesci on FA, haha. I'll repeat myself here anyway.
The species is still under development so there is no reference sheet or character creation available yet. I have more work and fleshing out to do for the species, plus an application process for those unable to purchase or not interested in any premades OneTiredSchmuck intend to release. OTS is also the only artist, currently, allowed to take commissions for Kaesci designs as they are most familiar, aside from myself, with what is permitted in the species. So, if you don't want the premades, but don't want to or can't commission OTS for a canon-kosher design, you'll be able to submit a Kaesci design (a description, basically. I'm aiming to create a form to fill out so it's easier for everyone) for approval. If it meets Kaesci canon, you're golden. I'm not entirely sure how I'll handle this process yet, so sit tight. OTS will likely announce their release, as will I.
Basically, I'm still ironing out a lot of creases here so stay tuned.