Most every gauge re-builder wants $200 for each gauge though.
Here is a testimonial of his workmanship:
I recently had the speedometer (the odometer portion) on my 1968 Triumph start counting the 10,000 miles number randomly and decided to send it off to be rebuilt. I checked around and found a few places that did the work but all wanted over $200. So I started to look on eBay to see what a new instrument would go for and came across another guy named Bob Carter up in Oregon who was rebuilding them for $129 plus $10 shipping. I emailed him and followed up with a call once I got his number and decided to give him a try. I got the instrument back today and he did an outstanding job on it. The internal parts of these gauges were removed, completely renovated and calibrated to meet the specifications of newly re-manufactured ones. In addition the cans (cases) were professionally powder coated to Concours quality standards. Then the insides of the cans were painted with white epoxy paint followed by the blue, light enhancing paint that was sprayed on the one section of the inside the exact same way and in exactly the same shade as Smiths did it when they were built. This gives a softer shine to the light rather than just harsh white light. The center aluminum buttons were polished and the correct shade of fluorescent red was added to the needles. Then new bezels, glass, upper and lower rubber glass sealing seals, new stainless steel chassis screws (will never rust or tarnish), the internal and external shock absorbing rubber biscuit mounts and the stainless steel nuts and washers for the mounting bracket were added. He also added an original 'TRIP SHAFT' warning decal. This does not appear to be the cheap decal being currently sold on Ebay and elsewhere that are simply replacements with lettering that smears and rubs off the first time you wipe down your gauges with a cloth. I will probably remove it anyway.