Yeah, long discontinued and tough to find for sure. It's like that with the DR8 and DR16's too, which I have quite a few of. Took me 3 years to find the akainet-based remote (DL1500). I have the midi version of the akai remote also, I forget the model number. That took a year to find on ebay.
If you have a midi card in your Akai, maybe the bigger remote works with it? Or maybe something like a JL Cooper Cuepoint. I've seen those here and there on e-bay, though not as often as I used to. I actually liked the cuepoint, small, easy to use, simple.