speedometer repair

I have a 150mph speedometer that I want to put in my 68 Barracuda's dash but the red pointer is broken off and missing from the base of of the dial. Is this a DIY repair (I have a 120mph speedo that I can use for parts) or does it have to be sent out to the speedo repair guys? If it is a job for the experts, who do you recommend? Is there any Canadian repair shops?