I agree with this 100%. Order soemthing off Ebay (probably $5) and use it until it breaks. Not a great solution, but better than the FM option any day.
Ultimately, in the last vehicle that I had it was annoying enough that after a few adapters died, one during a long trip, that I dumped a bit of $$ into a newer head unit with AUX input. I'd go to Crutchfield for that. The kit they sent was really easy to follow and install and I think in the end I only had $200 or so into the new unit including shipping.