Communicated with the company's staff via email, and they agreed to deliver the car to our hotel in Colombo. The young man who helped us with the temporary driving permit was quite enthusiastic. He facilitated the process at the Colombo DMV, speeding things up (even though there was a dedicated counter for foreigners, there were many Indians and Bangladeshis getting permits). The service fee was 80 USD, which probably included some tips for the DMV officials. The process took about 50 minutes, and we successfully obtained the temporary permit. At our request, the young man took us to a supermarket and a gas station before we hit the road.