Tachometer with 0-10 VDC output

Hello All,
I am looking for a Tachometer that I can install on some takeup rolls that will mount directly on the the roll. I don't have the luxury of using an encoder since this is an existing machine I am adapting to. I would like something that is mounted much like a hand held tach would except I need it to provide a 0-10 VDC signal to bring into my PLC. An instrument that would give me FPM would be perfect, but I can figure that out based on RPM if necessary. If any of you know where I can get such an instrument, please let me know.
Thanks,
ghaulk

we use this tach and run it thought a action pak and convert the 0-10vdc to 4-20 and it works great.http://www.servo-tek.com/PAGE10.HTM