You can buy the short-sleeved version (dress called Roland Mouret dress) here: https://www.theoutnet.com/en-gb/shop/product/roland-mouret/dresses/knee-length-dress/arch-off-shoulder-draped-crepe-dress/560971904122714
Looks like Saks Fifth Avenue - see link - reduced to a quarter of original price too!
https://www.saksfifthavenue.com/product/roland-mouret-clover-off-the-shoulder-wool-sheath-dress-0400010620629.html?ranMID=37410&ranEAID=QFGLnEolOWg&ranSiteID=QFGLnEolOWg-8WfttC765WNxd6hLK9.EwA&site_refer=AFF001&mid=37410&siteID=QFGLnEolOWg-8WfttC765WNxd6hLK9.EwA