Best value Set amp for under $1500 used is ok.

The LS10 is a preamplifier.

Are you looking for an integrated 300B amplifier?

If so, the Willsenton R300 (mentioned) is the only one, price wise, that comes to mind.

I have seen online pics of some models marked 220V/50Hz on the back.

Here's a recent thread about an owner (R300) updating the coupling caps in one (nice internal pics).

In the US I can have one delivered for $1500 with free shipping (Amazon), but I don't know about availability in Australia (I assume that I would be charged sales tax on the purchase).

DeKay

Willsenton R300.  I have it.  It's an excellent amp.

Thanks to all who suggested the Willsenton and other suggestions. I will certainly do some more research.

@dekay I couldn't edit the post to correct the LS10 reference. Actually the power amp is an ARC D240 MkII. I will read that post you've linked with interest, thanks.

I've had a Prima Luna Dialogue Premium amp previously but not connected to these speakers, earlier I was using the Elac 247.2 and the combo was very good.

If I consider budget only, 300B tube amps are hard to find and fit the bill. This push pull amp seems like good value: YAQIN MC-84L Class A Push Pull Tube Amplifier and there are others by Dared that are in the budget range. 

This is a Living Room system that is coming off a cheap Marantz 1509 AVR and using preouts to couple to the power amp. And the reason for that is the furniture that is impossible to find: furniture that has openings high enough and multi-level to fit pre/pro for example outside of IKEA or a dedicated hifi rack that costs a fortune for the length required.

Living room speakers and media unit 

There are a small number of boutique amp builders here in Oz...outside the budget.

I have a Willsenton R8 and can attest to its attributes. Great tube qualities of bloom and holographic sound staging, and surprisingly fast tight bass. Highly recommend. That said I imagine their 300B is glorious. 

I was a little hesitant to buy something that would have to ship back to China if/when it needs repair and really wish it was made in America, which is why I’m on the waitlist for a Decware 25th anniversary Zen. 

I spent the day watching reviews and the 800i gets a good rap as does the 300R too. Outside of budget…great value etc.