21-05-12, 09:53 PM
I found mine very easy to fit. Worst part about it is the header nuts. Make sure to soak them in WD40 / Penetrating Fluid for about a week before you attempt to take them off. I did this and mine practically fell off which was handy, replaced those with some stainless steel nuts as well 
Not certain about company to company, but I ended getting my set from the Sandy Bike Spares eBay shop

Not certain about company to company, but I ended getting my set from the Sandy Bike Spares eBay shop