cheap micromanipulator

Dear all,

We are looking for a simple and cheap micromanipulator that we could
use to position single fungal conidia in an ordered array on a Petri
dish. In the "distant" past I have used micromanipulators designed for
yeast tetrad disection that were really simple (and presumably cheap):
they basically looked just a group of screws attached to an inverted
microscope. I have not been able to find one of those now. Does
anybody know who sells them?
I have seen the nice tetrad disection microscopes sold by Singer
instruments, but we really do not need such a complicated and
expensive equipment.
TR