Yes, definitely Orbea (or Stapelia) variegata. Not sure how you'll go getting it pollinated as I don't think they're self fertile - you need two plants of different clones- but sometimes strange things happen, so mightn't be a wasted effort. Also not sure that our flies are built quite right to carry out pollination. Stapeliad pollination is very complex and involves what amounts in simplistic terms to a "key" needing to be presented into a "keyhole"...but you (and the bugs) can get lucky sometimes, so never give up !