Ares came up with a new flatland specific pivotal seat called Minato Seat. It will probably remind you of the famous KHE Watanabe which is hard to find these days. In order to produce a plastic seat like this you need a casting mold which is an expensive thing to make and only economical if you want to produce a lot of seat. That makes it almost impossible to get a prototype made but the clever guys at Ares found a company that would make a sample using a 3D printer. You can find more details on that prototype including a photo here.
Eventually they decided to go into production and the seat will be available later this summer.
Retail price: 3400 yen / 30 USD Delivery time: around the beginning of August 2017 Size: 180.96 mm Color: Black Only
As we read on Flatlandfuel (you can preorder already) 'The tip has 3 cutting patterns in increments of 5mm so its easy to make it smaller and lighter to suit your preference'. A matching seat post will be released as well. The new version of the stealth seat post has a length of 330mm and will be available around August as well. More details on the ares website where you can preorder as well: http://aresbikes.com/minato-saddle-begin-accepting-orders/