I wasn't sure if you were saying SurveyMonkey is missing SPSS export - it supports exporting to SPSS AFAIK. Is it that the export is missing data or features for your needs?
Long term, the whole survey industry should probably move away from SPSS to something fully open source, with a file type that is truly standard that can be read into all the different systems.
PS - I know that there are APIs for individual questions, data, etc. But, as an analyst first and programmer much much later on my list, I find them too complex to really be worth it. A lot of survey analysis is one-off.
I'd love a pandas/numpy/python call that just looked like:
get_survey_as_dataframe (surveyID, API_key, any other stuff).