Gordon, does that taillamp have the brake light. I had one like that, made by Minda, it didn't have the brake lamp.
You can get the Smiths 'type' speedo meter from these guys in delhi. They'll ship it to you. The Smith's type is calibrated in miles and the price is Rs.500. They have lots of stuff that goes to the export market check out their website. I've emailed them once and they're prompt in replying.
India's leading distributor of motorcycle parts. Specialists in Royal Enfield spares and accessories. 
@Dimali: How much did you pay for the automech exhaust, Does the package include the header pipe as well? Which handlebar is that?