The Sigma 30mm with the MC11 might work - I haven't test it myself though

smallZeiss Loxia 35mm f/2.0:Pros: Fully metal construction, goes down to f/22, direct manual focus, fairly small, declickable apertureCons

I've tried about 10-11 Zeiss and Sony lenses in my career, and this 35mm is by far the best of its class

qualitySony/Zeiss 35mm f/2.8 (SEL35F28Z):Pros: very compact, lowest priceCons: not as bright as others, no aperture ringBest if you need