Shauno,

One way to do it if you were betting large, would be to bet thru STAB, UniTAB and IAS.
IAS guarantees to beat the div paid on the NSWTAB for place divs. Therefore, best to not bet in NSW and take the higher odds thru IAS. Their limits are not all that big though from memory. But you could for instance place 3 $1,000 place bets thru STAB, UniTab and IAS.

This is where Win betting is better - you can secure fixed odds. Agencies don't have fixed odds place betting for this particular reason I would imagine - they would get killed by system players.