If anyone is interested I've been sourcing anvils and have looked a fair bit at Rail track as a use, I found that its hard to get especially here in Queensland (Sunshine Coast), for info I found a guy very helpful in Victoria details are
EMRAILS http://www.emrails.com.au/enquiries.php
*Street address:*
1257 / 1259 Ferntree Gully Road
SCORESBY, 3179, VICTORIA
*Postal Address:*
Private Bag 3, Ferntree Gully
VICTORIA, 3156, AUSTRALIA Toll free: 1800 804 276
Fax: 1300 735 348
Ph: 03 93111266
Fax: 03 93115322
Has some smaller pieces suitable and also heavy gauge