I bought an aluminium one from Machine Mart. Handled an SP1 into a VW T4 with no problem, and the one review on their website says it handled a Busa with ease.
I didn't really want to part with £80 when I bought it, as I used to make do with a plank for my trail bike, but there was no way that was gonna handle a superbike.
if you're still looking try Demon-Tweeks
I have had a home bodged steel trellis affair for years but they just had some lovely ally fold up ones half price so I got one - £35 I think
Takes about 300 kilos too
if you're still looking try Demon-Tweeks I have had a home bodged steel trellis affair for years but they just had some lovely ally fold up ones half price so I got one - £35 I think Takes about 300 kilos too