Hi Phil
I presume you have NSW Podiatrists Board registration already? And you've had your medical too, I'm guessing? If not, you can get your reg in person, but make sure you've all the required documents with you.
You could try an agency for locum work, or possibly the APodC site.
I have it on very good authority that employers in general are not so keen to get involved in 457 (employer sponsorship) visas at present, do I think your best bet would be to apply for an onshore 175 (skilled independent migration) visa if you wish to stay long-term. The 175 is good anyway, because it is a permanent residence visa (multiple entry, so no resident return visa needed). After 4 years you can apply for citizenship, should you wish to do so. As it's an independent visa it means that you are not tied to a specific employer; the disadvantage is that it's more expensive (for you) to acquire than sponsorship - around £1k I think. But you'd have already had your meds done (& maybe your police check), and your APodC skills assessment, so that only leaves the visa fee.
If you want any advice/help with regard to this, PM me & I'll do my best. I've recently been granted a 175, so I know about the process first-hand.
Another good source of info about visas can be found on
www.pomsinoz.com - you'll find me if you read a few threads. I found the site really helpful, just wish I'd found it before I put in my visa application; although it was actually pretty straightforward.
Good luck
Sarah