If you have a Terra Trike dealer near you, the trisled might be doable. Terra Trike took over the Greenspeed IP when Ian Sims' estate sold, then wound up, the business. Trisled are the Australian dealer for Terra Trike, the deal may go bothways, but I don't know for sure.
Trisleds tend to be build to order, while Greenspeeds are a stocked product, so overseas pricing might be risky and much higher. Strangely, probably the AU/US exchange rate, Greenspeeds are more expensive here now, from a starting point of $1500 moreso. And heavier! Like a quality mountainbike weight compared with "delicate" racing bike.
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Trisleds tend to be build to order, while Greenspeeds are a stocked product, so overseas pricing might be risky and much higher. Strangely, probably the AU/US exchange rate, Greenspeeds are more expensive here now, from a starting point of $1500 moreso. And heavier! Like a quality mountainbike weight compared with "delicate" racing bike.