Proctor Wall Jacks – Rent in NW Oregon?

Hey All-
I’m currently framing a second floor addition to a house in NE Portland and I’m in need of some wall jacks. All of the rental agencies rent the type that crawl up a 2×4 or 2×6. I’d prefer using the Proctor jacks, but can’t find any to rent (I don’t do this enough to justify the expense of buying a set). Is there anyone out there that knows of a rental place or would be able to rent directly to me for a week or so?
Thanks in advance for any help.
Cheers,
Jason