I think it was £49 + VAT. Some of the odd diameters they do are more expensive though. I went for a 70mm OD neck on the filter and also bought a piece of silicone tube with a 70mm ID to fit onto the MAF (MAF is also 70mm OD). That way I didn't have to use any reducers. I've read on here that a lot of people are using the Jetex/JR filters but I wanted to try something different.
I'm also using something different for a dump valve from the usual Forge set up. I've go a Turbosmart recirculating valve. Made in Australia and I must say the machining on it feels very good.
Do you have an LCR or an LC?
I've found an 80mm one which I may give ago when my Pipercross gets tired.
http://www.merlinmotorsport.co.uk/p176/ITG-MAXOGEN-AIRFILTER-80MM/product_info.html
£69 though. Hmm..