Here it is:
http://cgi.ebay.com.au/BRITISH-UNIVE...3A1|240%3A1318
OR Item number: 170277271426
AND
http://cgi.ebay.com.au/BREN-GUN-CARR...3A1|240%3A1318
OR Item number: 170277487053
AND
http://cgi.ebay.com.au/BREN-GUN-CARR...3A1|240%3A1318
OR Item number: 170277270468
Seller unknown to me. In fact, I am surprised you blokes haven't seen these parts yet

.
No idea if they are goodies or a baddies.
I'll stick to wheeled vehicles not tracked ones.
Ian