If you mean "manual" as in you push it around lugging along that huge fat blue hose and it sucks things up into your filter....any of the standard heads for vinyl pools will do the job. Just make sure its meant for vinyl so no sharp edges.
If *I* had to manually vacuum a pool I'd again, I'd use my Pool Blaster Max for the job. Not sure how dirty your pool gets but before we got our robot this was all we used in our "never too dirty" inground pool. (our cover helps avoid a lot of schmutz admittedly, but small stuff could sneak in like worms)
We love(d) our PoolBlaster Max. Check them out, they attach to long poles too. But Skippy preferred to use it while in the pool wearing goggles and just held the handle.
Maddie