They actually make Pen Pen ufo catchers and they're on ebay a lot, but they're REEEEAALLLLY small (like beanie baby size). But if you're lookin for BIG Pen Pen goodness, yea you'd probably want it made from those guys.
i got mine at a con *scratches head* though i forget which one or which dealer... so i guess i'm not much help.
but i can say that there are official ones out there, if you so desire to find one. mine's like, maybe 12 inches long, fat and squishy. ^_^ and he sleeps with me sometimes. which would be really cute if i were in my Asuka plugsuit when i did it. *hehe*
~i hate to double post, but i just remembered that the PenPen i'm holding in my pictures here is EurobeatKing's, not mine. his is quite smaller than mine, so, yeah. there must be many different sizes. ^_~ that's all~