Buy a Worldmark. This is an easy trade. You can do the exchange within 60 days and it only costs you 4000 points. Here is what I saw on II today, searching from now to end of Sep for 1 and 2 BRs:
Marriott's MountainSide
MOU
Sep 15 2018 - Sep 22 2018
2 Bedrooms | Full Kitchen | Sleeps 8 total | 6 private
Sep 21 2018 - Sep 28 2018
2 Bedrooms | Full Kitchen | Sleeps 8 total | 6 private
Sep 22 2018 - Sep 29 2018
1 Bedroom | Full Kitchen | Sleeps 4 total | 4 private
Sep 23 2018 - Sep 30 2018
1 Bedroom | Full Kitchen | Sleeps 4 total | 4 private
Sep 28 2018 - Oct 05 2018
1 Bedroom | Full Kitchen | Sleeps 4 total | 4 private
Sep 28 2018 - Oct 05 2018
2 Bedrooms | Full Kitchen | Sleeps 8 total | 6 private
Sep 29 2018 - Oct 06 2018
2 Bedrooms | Full Kitchen | Sleeps 8 total | 6 private
1 Bedroom | Full Kitchen | Sleeps 4 total | 4 private
Sep 30 2018 - Oct 07 2018
2 Bedrooms | Full Kitchen | Sleeps 8 total | 6 private