Ascension in Customs

Can we get the ability to play Custom Ascension matches please? My friends and I love playing Mike Myers on this map when it rotates in because it's the only map we can get it to work on and be interesting. Also I gotta ask, why can we no longer create Custom games of Ascension? Recent rotations of the game, we could(This was after the legacy client was discontinued). So, can we please get it back next weekend or even like tomorrow?

Thanks, -Your fellow summoner