Dunno, I got mine from a scrapped 147.
Youd have to spend some time googling it I guess, I did see some bloke with a video of how to do it on youtube.
Or you could buy a cluster from a later 147 or GT with white LEDs and swap over chip 93c86 (which stores the mileage), its a lot less soldering (only 8 pins - theres 14 LEDs, with 2 pins each, so 28 pins to solder if swapping LEDs). Youd probably have to proxy align it though, unless the cluster is EXACTLY the same type as yours, which I m guessing it wont be if you have a "mjet". I recently swapped 2 93c86 chips over between 2 cars that were exactly the same model and year to save having to re-solder all the LEDs that I d changed before, I expected to have to get both cars proxy aligned but the mileage didnt flash on either car, so as well as carrying the mileage this chip also seems to carry the ID of the cluster (which is a node on the CAN Bus system hence why it would neeed re-aligning). However, if yours is an earlier car and you put a later cluster in youd probably have to get it proxy aligned even after swapping the 93c86 chip, because the cluster is a different type (there are at least 3 types).