I would imagine that Home Depot carries the paint. Don't know what a Lowes is. They aren't in Canada eh.
I used it once on kitchen cabinets that were moved from one house to another. In order to make a matching filler strip, I took a door into our local hardware/paint store and had them colour match it using their computer. I couldn't believe the result. It looked identical to the rest of the 15 year old cabinets.
I finally got a chance to get over to Home Depot, they do not carry melamine paint. For what it's worth.... the guy in the paint department said the ocassional cabinet store may carry it, but it's pretty rare.
Yes, those paints are available in the U.S. I think that Para is limited to the north central U.S. I checked with a few paint stores here in Montgomery. Only one had a source for melamine paint and it was a specialty paint supplier for the construction trades. You might also try calling some of the U.S. dealers listed on the Para website to see if they could ship what you need. I also found out that Para melamine is fully tintable.
"... and remember. There is no more important safety rule than to wear these - safety glasses."