Which Firmware for DIR-652?

i have two (revA1: Ubicom IP7150U and revB1 Atheros AR9342) of this DIR-652 and i want to flash openwrt on it.

Theres no devicepage or any other information under openwrt.org except dlink-forgotten-open-devices-dir-652.

It has 8MB flash and 64MB RAM. Is there a firmware which will work on this DIR-652 ?

It seems like this is the 1000M version of DIR-300 (100M).

Hardware Info
device on dlink.com

If it's not on openwrt.org then it's not supported. Although the ar9342 soc is supported the 8/64 features doesn't make it an attractive target