Does anyone know where I can get a Hitch Extender from?

It is not that easy. I have tried Google. So far no luck with accessory places.

I think you would stand a much better chance of getting one from a "shonky" tow bar manufacturer. I suspect these things would be illegal in Australia.

try carac in dandenong
www.carac.com.au

What sort of vehicle is it for as have seen some on 200 series but longer drop on them.

Remember the further out you poke it the more the pitching action will be.

Eg put the ball further back from the axle and it will pull the front end up further.

The shorter the extension the better

Dead right The tongue that came with my towbar for the 100ser stuck out over150mm.

I took it to an engineer and had it cut and redrilled and it made an appreciable difference to the characteristics of towing.

To deliberately lengthen one defies logic as it will put a lot more strain on the towbar and bolts and chassis

The closer you can get your towball to the rear axle the better the effect of

towing and the less effect of swivelling the car up at the front..

If it is to hang something on the back of the car it would be better to put it

somewhere else as the more weight behind the rear axle the less weight on

the front and decreased steering response and hence safety.

If it is for a bikerack.
You can buy a bikerack from most good bikeshops to fit any car sold in Australia.

I have two spares on the back,so I would really appreciate it if you could pass on the name of a specific good bike shop that you know as I have not been able to find one.
Vic

Sadly you cant have everything.

Would be easier to get a custom Bike rack made with a bend in it than illegally modify a towbar.

Whats wrong with a pole with a horizontal bar to hold the bikes

Have seen them that hold about 4 so should stick out past your wheels.

One would think you would have to have heaps of good suppliers of bike carriers in Victoria Vic. It is the capitol of cycling in Australia.
I've got a REPRAC 3 bike carrier. They also make a 4 bike carrier. The bikes have heaps of clearance behind the spare on a standard Patrol wagon. Not too sure how this particular one would go on your set up but somebody must make one to fit.
From my failing memory I think mine was $180.