There are a few good self-report measures designed to get at DSM personality disorders. The Millon Multiaxial Clinical Inventory (MCMI-III) is very good; the Personality Assessment Inventory (PAI) is also said to be quite good, though I haven't used it. Each would include a Paranoid Personality scale. There is a Paranoia subscale on the SCL-90-R that has good items, though it doesn't ask specifically about DSM criteria.
One problem with inventories that ask explicitly about DSM criteria is that they are both transparent and obviously pathological. This is especially problematic with paranoid people! Lesley Morey developed personality disorder scales for the MMPI-2 about 25 years ago. This scale wouldn't have the criteria, but was designed to differentiate paranoids from "normals."
These are all commercially available measures.
There also are measures of "subclinical" paranoid ideation. These could be useful for you. They may be transparent, but won't be as obviously pathological or undesirable.
I don't know much about it, but Fenigstein and Vanable published one in the Journal of Personality and Social Psychology in 1992 that has been used in a number of studies. I'll attach a copy of the article.
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