The drama surrounding the fact that OnePlus has close ties with Oppo has finally amounted to something, it seems. The various similarities between the One and the Find 7a in hardware have made it possible for developers to port the ROM from the One to the Find 7a.
To flash the ROM, all you have to do on your Find 7a is install a custom recovery such as TWRP or ClockworkMod. Then, install the ROM you find at the source link through the recovery. After doing so, install the OTA found at the second source link to fix sound issues.
Right now, a few things are currently not working, so you may want to stay away for the moment. Anything shot from the rear camera will show up as upside down, voice wake is currently unavailable, NFC won’t work for you, and the software shows that only 3GB of storage is available. Huge problems, indeed.
If you’re an adventurer, though, by all means, try this one out and let us know what you think!