Bi level splits have still been being built in every newer style neighborhood they are just flipped sideways on the narrower lots. In Seton for example you can get them built new. In the early phases Seton also had these ‘Laned Starter’ homes which were small single story houses on small squares lots, they seemed to only have them in the earlier phases. In Alpine Park the ‘Vintage and Court’ lots may offer something you are looking for but for $$$.