Progress.
This is what it's made of:
www.basf.com.br/PSMLoad.dll?id=2280&usage=501
Material code pa66 gf35. The engineer at Philips is going to assist in resealing this bad boy. I got a call back from M&H suprisingly, I have a contact that possibly worked on the plenum when it was produced. I'll see if I can get any leftovers, highly unlikely though but if you don't ask you don't get! But with the material code (that is actually printed on the plenum) a suitable method of bonding will be possible to select. If we've got replacement arms- we should be good to go!