I fixed my bulb this weekend and i modified the holder to be able to mount an regular instrument bulb(atleast regular i european cars) and i didn't remove the whole dash.
I removed the lower plastic and the steel plate under the steering wheel, the five screws to the plastic around the gauges and the fusebox and the mount clips for the fusebox so you can bend it out of the way.
Now you can bend out the plastic around the gauge so much so you can see and remowe the screws to the switch from behind, with a screwdriver from the space where the fusebox used to be.
Then to the tricky part, replacing the bulb with a bulb that is a regular instrument bulb (the same width a bit longer tho, and it ment to be replaced without changing the holder) i removed the org, bulb gently with its tiny wires, and checked the length of the new bulb so it would stick out the same length from the switch as the original bulb.
Then i cut off the org, bulbholder at the right length, cut off the wires from the org, bulb, and mount the wires in the modified holder as they were in the beginning.
Then i put some extra loose wires in the holes in the bulbholder to thigten it up so they wont be to big for the wires on the new bulb, its gotta be tight so its a good conection
(the bulbholder is like a plastic cylinder with two small holes running thru it)
and finally i straigten the small short wires from the new bulb (the are bent and put along side the bulb uppwards) and sticked the new bulb wires in the holes in the modified holder.
Then fasten the new bulb in the holder (i used a glue gun) and you are home free! Maybe this is a loony job
but its a lot cheeper than Fords crappy original bulb, and this bulb is made for cars, the original have i only seen in home stereos and they dont shake a lot...