Jimbob and others,
Do you still have the 'nub' that broke off? If so, this is how I fixed mine...
I took the entire door out, I think I had to remove the auxillary gauges to do it. once I had it apart I could place the broken nub back in place, you have to match the break, it can only go two different ways. After knowing which way was correct I superglued the nub back in position. Even though it is instant glue, I gave it 20 minutes before the next step.
I took a steel common pin and measured the diameter, I used a digital micrometer. Taking the correct size drill bit ( yes I know its tiny ) I drilled through the top of the nub into the body of the part. Once all the way through, I tuned the part over, and with a 1/16" bit created a small countersink on the back side.
Check your common pin to be sure it will slide all the way through the part, leaving the head of the pin at the top of the nub. If satisifed with the fit, coat the common pin with a little super glue and slide it though the part. Immediately grab the pointy end of the pin with some plyers and provide light positive pressure for a minute or so.
Place the part nub down so the head of the pin is resting on small piece of wood, and snip off the pointy end of the pin. ( if the pin had a loose fit, it may want to jump out when you snip it ) Finally, fill that countersunk area with a bit more superglue just for insurance. Paint the top head of the pin black and reassemble the part.
It is delicate work, but being a model builder, I use common pins all the time to secure small parts. I did not specify a diameter of the drill bit, as you will find common pins in different diameters. Once you have the size, you can buy individual tiny drill bits at a hobby shop.
I hope this helps, Jeff
Cape Cod Blur