DIY Crib to full size conversion

[sierra5454]

We purchased a Munire Newport 4-1 crib a few years ago on Craigslist that did not come with the full size conversion kit. It's an older style and difficult to find the conversion kit online. I am wondering if it would be possible to simply build the conversion kit myself. Does anyone know if I could simply buy the hardware at local hardware store and what type and size of boards I would need for the frame and slats?