Did you find them?

http://au.rs-online.com/web/p/non-resettable-wire-ended-fuses/2260557/

Thanks Retro Pin, the link helped now I need to find these at RS (BZW06-64V transil diode) and I can get all the spares I need and at a good price. :)

Chris, I am having a bit of trouble wrapping my head around your suggestion but will look at it again tomorrow with a clear head.

Cheers: Brettski... :)