James, are you in the US? If so, check out this ebay seller:
http://myworld.ebay.com/amt33461/No affiliation other than a satisfied customer.
(if the link doesn't work, search for the seller:
--- In Homebrew_PCBs@yahoogroups.com, "James" <jamesrsweet@...> wrote:
>
>
> >
> > Even with several hours etching time I do not see any bad
> > under-etching, or pitting. I have mostly double sided stock but prefer
> > single sided designs, so the back side hogs easily two thirds of the
> > etching time while the artwork side is already done much sooner. If
> > I'd see problems with underetching I'd do something about that, but so
> > far there are none. I use mostly 10mil/0.25mm minimum trace width.
> >
> >
> > ST
> >
>
>
> Heh I have the opposite problem. I have mostly single sided stock but it's more and more often that I'd like to do a double sided board! Vetco has 20"x24" 1/16" single sided board for $12/sheet but I haven't found a good price on big pieces of double sided.
>