Question: Who makes these HO 'portable' metal barricades

Please take a look at this image from the 1/87 Scale club: Air show Diorama
Alas, there doesn’t seem to be much infomation supplied other than Hartmut Peters modeled it (OK), and it’s probably German, and since the 1/87 yahoo group is a bit mellow this week, I figured I’d try my luck here - those ‘crowd control’ portable metal barricades look rather good, and I could certain use them on my (soon-to-come) early 21st century based layout, so anyone know who’s producing them?
Thanks.

http://www.euromodeltrains.com/cgi-bin/search_item.pl?session=MTIwNjE2NDA0MXx8fFVOSVh8MTg3NTcxMzY0MDAwOTQ3MTQxMzc0Mjl8KTAzLjYwNTQwLjAuM1JMQ1RFTi58&ss=UHJlaXNlcnwzMTAxOCAg

There’s some in this kit from Preiser. I don’t know what scale that airport scene is. They may have come from some architectural modeling site and be an odd scale. Airplanes aren’t usually HO or N or anything like that.

http://www.reynaulds.com/preiser/temp.asp?item=25175

There’s these too.

Ah, thanks - you got it in one - Presier it is.
Of course, they were listed in my Walthers catalog (hardcopy_ in the scenery section, but under a ‘barriers’ AND with no image or real description, so I didn’t see them. (And on the on-line catalog…‘not currently in stock’ of course [xx(] ).

And for those interested, an interview w/ NYC police commissioner Ray Kelly about these Metal Barricades (called by NYPD French Barriers) replacing wooden saw-horses…