Rattle can paint or? ('69 Lt. Blue)

[WorkinLonghorn]

My '69 GMC came with light blue paint with a white top. I just went down to the local paint shop to see about getting some spray paint for the hood I bought recently. I brought them the paint code (507) that I saw on the internet but they were clueless about what color it was and said I needed to bring a piece in with that paint on it. I had the truck sitting there at their front door but they could not help. The truck was repainted at some point, possibly in the 80s and it looks like the original color ("Light Blue").
Anyway, one of the guys told me it would take "3-4 cans" to do the hood at $40 each. Ouch.
Does anyone here have a line on some on-line paint that would do for this? It is a work truck and is currently a bit rough so I'm not looking for ultra high quality, just something to look normal on a driver. Thanks -BA The color on the door. The fender and old hood (off a '68) are medium blue i believe.