Printed circuit board fabrication

You people have given me great advice before (grovel, grovel) so here I am
asking for some more.

I've made PCBs before but always as one-off projects using transfers and
etch resist pens. But I need to produce 50-60 now !

My requirements are very modest...single sided, a couple of 14 pin DILs and
a few other components, size around 50mm x 100mm.

Does anybody know of a reasonably priced outfit who can supply small PCBs ?
Artwork would be supplied by me. In what form is this normally required ?

Or should I go ahead get a photoresist kit and supplies ? I'm starting from
scratch here with a few working prototypes on veroboard.

Thanks all.