We provision our rental houses every trip. It isn't as easy as we have found it on other islands (VG and Anguilla) and you will pay for the convenience. I think the fee (on top of the actual food cost) for our last trip was $150. (we had a huge beverage order, she did a lot of heavy lifting)
The past couple of trips, we used Shanna at Blue Sky Management -
http://www.blueskymanagement.net/villaprovisioning.htmlI like her shopping lists. Our orders have been complete and the beverages cold when we arrived. I will continue to use her and recommend her as well.
I think Katilady may have gotten out of the provisioning line of business.
I have heard that Starfish (the market) will do villa provisioning but I don't have first hand knowledge.