Here you will find one: http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE59739
It is from this publication: Usoskin, D. et al. Unbiased classification of sensory neuron types by large-scale single-cell RNA sequencing. Nat Neurosci 18, 145–153 (2015).
There's a few datasets from the 10X Genomics platform here:
If there are studies you would like them to include, get in touch with their Support team. Their major requirement for inclusion is to have access to the raw data.