As an owner of one of these, it's a Tester68\CIY68 that costs 15$ on taobao, 34 bucks on keebmonkey's site and 28$ on aliexpress.
Also - while it is quite good as modded stock (just relubed the stabs and straightened wires), it doesn't have software (or rather I couldn't find one, would love if you could point me to one) so stock fn mapping :(
I'd say if you want a cheap, wireless 65%, get it on AE.