Search for a studio/small flat - 2 months (900-1000€ per month)

Hi, I am Francesco a postdoctoral researcher and adjunct professor in Italy. I am looking for accommodation to rent in Leiden (or nearby) for two months, from October 1st to November 30th, as I will be acting as visiting scholar at Leiden University.
I am looking for a studio/small flat (not sharing), and I am prepared to pay 900-1000 (max) euros per month.

I am clean, polite and well-travelled.
Any help will be greatly appreciated!
Many thanks!