Q wrote:

The main problem here seems to be limited availability

But you should have model builder shops (planes, ships) that sell that
stuff. At least per mail order. Or you get hints where to look for at
modelbuilders forums (yes, the colorful forums are evil for NewsGroups
users).

Nick
--
Motormodelle / Engine Models:
http://www.motor-manufaktur.de
Ellwe 2FB * VTM 87 * DLM-S3a * cubic
more to come ...