http://www.ptr91.com/ptr44.html
I figured it was inevitable at some point. There's also a German company that re-introduced them a few years ago.
Unfortunately, this is the same company that makes those crappy G3/HK91 clones.
EDIT: Oops, my mistake, it turns out they're just the importer. The guns are actually made by Sport Systeme Dittrich in Germany.