So finally my custom seat from Lepera arrived.
It's beautifully made, exactly how I had envisaged it and is super comfy (so much better than the stock seat). The kick at the back means I no longer feel like I'm slipping off the back of the seat under heavy acceleration.
The workmanship is excellent. They did exactly as I asked and I'm super happy with it.
Total cost was $351 - which was the charcoal sparkle metal flake seating area, diamond stitch, white piping etc. Shipping to AU was $80 (priority USPS). When I placed the order on 1 May Lepera told me the date it would ship and they were spot on. It shipped on 22 May and I received it on 28th May.
It won't be everyone's taste with the sparkly seat inlay but I love it (and I'm pretty sure that nobody else will have this combo on a 48!).