Polyurethane suspension bushes

[K666ADM]

With a large number of off roaring enthusiasts and these high temperatures the rubber bushings are prone to short lives, this has me wanting to put on some polyurethane bushes to my landrover LR2, but can I find a shop that has heard of these, nope. Powerflex, Polybush and many other marks are easy to source online but was hopeful to find a retailer here- has anyone had any better luck with finding such parts?