i checked into that, as I am an alpine dealer. It's either made by PAC or maybe soundgate, I can't remember which one, in either case, it's not woth it. If I can remember correctly I think it sells for about $150 USD
Just go w/ the PAC, it's inexpensive & very easy to learn...You can splice into the correct wire right under the dash, you don't even have to take the column apart. I think my signal wire was white w/ a red tracer, but I could be wrong, it's been a while. Your may vary anyway. It's best to check it at the back of the headunit.