My honest opinion is that you would gain little from such a control.
It is a fact of life that, when an experiment fails, the researcher
will look for someone to blame it on. Core facilities are too easy
a target for blame.
We all know what research is like: you work day and night, setting
up a complicated experiment - and it fails. You're SURE the sample
was fine, the primer worked before, the experimental design was
impeccable. "I'll bet that damn Core screwed up."
You'll show them a standard that proves you can sequence a PCR
product, but it's not their primer and not their DNA. They'll
frankly still be suspicious that your technician screwed up.
I know of no commercially-available PCR products. best I can suggest
is that you simply keep on hand a few successful PCR reactions to
demonstrate your prowess. Good luck!
Bob Lyons
University of Michigan