transplanting the needles would be the only way... but the needles do not come off... if you try, you'll either break the stem, or if you get them off, you screw up the calibration of the gauge... so it will be off. Trust me, ive gotten one off before... and once I got it back on and put it in the car, the speed was about 10 mph too high. Thank god that car was still under warranty by Acura, they replaced the speedo, I just told them "my speedometer seems to be inacurate".

If you were to cut the actual needle off where it meets the round "base" and find an attachment method of some TL (for instance) needles, that would work... but probably end up looking like ass.

 

the easiest way would be what sho akkord recommended.
transplanting needles won't work because they're made of a different material and weigh different.

 

why would that matter? they're not gravity-balanced or anything