Dummy Light Cover Source? Switch to gauges?

[blindbug]

To make a long story short, my dummy light cover on my 86' C10 Custom Deluxe 3 Speed Automatic is shot. I've looked at a few places but don't seem to see anyone selling the dummy light covers separately. Does anyone have a source for this little red piece of plastic?

This brings me into my next thought: change the whole cluster out. The gas gauge and speedometer / odometer work, and when I turn on the truck, at minimum the light behind the battery indicator lights up. If I keep the current cluster, I want to buy a new printed circuit, at minimum, to get all my lights working correctly (it's a bit corroded). But at the price of a new circuit, I can almost afford to swap out the cluster for one that has actual gauges for temp / oil / battery voltage. Should I bite the bullet and swap out the cluster? How much of a hassle is it to switch from a dummy cluster to a gauges cluster? Aside from the sending units, it there much more that is necessary? If my truck didn't come with sending units (just dummy sending units), do I just pull the dummy unit out and put in the gauges unit? I wish I was more knowledgeable on the subject. I have the know-how, if I have a how-to, but just not familiar enough with the process of switching out a cluster. I don't want to get into a cluster **** of a problem (see what I did there? )