Baba's posts have got me thinking about those Doozer pack-ins (not that the Count didn't mention them too). . .
Choking-hazard concerns have been the stumbling block for in-scale Doozer figures, but isn't there a way? Okay, you might have to cheat the scale a little bit, but I can picture little-bitty PVC-like groupings of two or three Doozers on a single base, as one solid piece. Or a Doozer in a crane or two Doozers riding in one of their jeep-like vehicles. If you grouped enough Doozers together or stuck them in vehicles or attached to Doozer buildings you could have your Doozers close to scale without having tiny eensy-weensy parts.
Not the same as a single-piece Cotterpin, I know, but it's something.
(And either way, the Count and Baba are dead-on right about having Doozer constructions as accessories. Those could be in-scale with the Fraggles regardless.)