It's not exactly clear to me what you're after, but you can get the winds off the ARFOR and interpolate for intermediate levels, then there's the grid points wind and temps forecasts for higher.
If it's an estimate of what wind to use for a climb, I was taught to apply the wind 2/3 of the way up, because you'll spend proportionately more time there as the rate of climb reduces.
Then there's the so-called Ekman spiral which as I recall says that the wind backs with height, eg. if it's 180 on the surface it might go round to 160 by 5000 ft or something - obviously not always the case!
Dunno if any of that's any use, but good luck.