Is there anyplace that will show the touch up paint colors for a 2006 HI-LO 17T touch up paint color for the end caps?

Your endcaps most likely aren't painted - the color is probably in the fiberglass gel coat. If you have a good automotive paint supply house nearby, they should be able to match the color and mix a small tin of paint for you.

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2307C / 2002 GMC Sierra 1500 ext cab (BellTech lowering kit, AirLift load-lifter air bags on rear axle, on-board compressor)

Thanks OLDCARGUY, I will give that a try. Appreciate the quick response and advice.

Tom Sawyer (TON).