I have read/been told that the W.E.Y grey motor rocker covers you sometimes see were made by "Waggott Engineering Yagoona". I cannot be sure of the veracity of this, though.
There is still a Waggott Engineering company, based in Alstonville:
Waggott Engineering
4 Hugh Street
Alstonville, NSW 2477
engine reconditioning camshaft grinding performance modification
waggottcams@turboweb.net.au
http://www.skybiz.com/waggottengineering/waggottengineeringPhone: 02 66283795
Fax: 02 66281620
Mobile:
The website is 404, dunno about the email address, but it might be worth a phone call if you're really keen to research.
cheers
RET