Hi Jim,
I took a look at the TUG Marketplace and for Week 12 (March 21 - March 28, 2020) and there were a few options available for you in Mexico. These are available to rent by owners:
Royal Haciendas
Royal Sands
Westin Lagunamar
Royal Islander
I believe they are All-Inclusive (AI) optional. If I’m wrong, others will chime in.
Link to TUG Timeshare Marketplace:
https://tug2.com/timeshare-classifieds/default.aspx
Also you could post a
Want To Rent ad here on TUG. In your case you would post that you want to rent by an owner a week 12 resort in the locations you wish, with the option of AI.
https://tug2.com/MarketplaceWishResults.aspx?All Rent Wish Ads&ToRent=True
If you look through some of the Mexico timeshares for rent on TUG and if it says for availability
weeks 1-52, that means the owner can book floating weeks, so the owner could try and book the week 12 for you if you contacted them and asked them. It can’t hurt to ask.
Also, you can try MyResortNetwork.com or RedWeek.com
If you want AI you can search RCI and see which resorts are AI:
https://www.rci.com/resort-director...sorts_and_Offers&track3=Text:Resort_Directory
Carol