Changing stock speedo and tacho.

Hi, so I'm thinking of amping up my regular 125cc road bike to cafe racer status. I was thinking of taking off the stock speedo and tacho and substitute them with a single speedo (with integrated odometer). The problem is that I'll lose the fuel gauge this way. Any advice on where I could buy a fuel gauge to go along? Or maybe a speedo with an integrated fuel gauge?

Thanks in advance