You could just implements a diode limiter circuit... I can\t draw you a schematics right now, but as soon as I get my hand on my PC, I'll post it. By the way, how does your input looks like? Is it a 3.19V DC?
Do a google search for datasheet on ULN2803. The ULN28xx family is an octal darlington pair driver well suited for driectly driving relay coils over a broad voltage range and fairly hefty power outputs from a DIP package. No need to build from discrete components when a perfectly good IC package exists than can do 8 for the price of 1.
Dialtone