You don't need a kit. Toss the trim bezel and mounting sleeve that comes on your aftermarket stereo and mount it ISO DIN style.
The trick is finding one of the OEM 1.5 DIN storage pockets out there. Been a loooooong time since I've seen one tho. They're out there, as there were a couple of different radio options for the 1st gen Leggy, and one of them was a single DIN HU with a 1.5 DIN pocket below it. Double DIN radio will fit, but you need a 1/2 DIN pocket, which is kind of worthless. I think you can fit *a* CD in it. . . as in one.
I might have one squirreled away somewhere back at mom's house (yes, it's been that long since I needed one).