As far as I know there is only one pure-bred female called Danissa.
Rotterdam Zoo sent out a male Tsavo some years back to continue breeding reticulateds in the future. I suppose he did not survive as the breeding male is called Dovele ... or something.
Sadly, still hybrids breeding and ... a slim chance that new blood may come from Europe. Allthough plenty of candidates to set up a pure-bred group proper.