Well you have to build that cable yourself, like I did

it's not very difficult, 8 solders on both ends. I'm also offering the cable you need for $20, but I really don't recommend buying that cable cause I suck at soldering and the cable is flaky. If the bid goes up high enough, I can build a better cable though (hopefully). The problem is, the amiga 23 pin connector is very hard to find.