Pro-Ject 2 Turntable Belt Price

Hi-

Just wondering if anyone could confirm the size of the belt for a Pro-Ject 2?

The old one is slipping badly & the size is not mentioned on the Henley Designs website....

http://www.henleydesigns.co.uk/product.asp?shop=0&ProductID=590

Does anyone know of an alternative to sourcing this item from Henley Designs?

I don't mind paying a reasonable price for a replacement (up to £10 maybe), but £18.75 + £4.95 Postage seems a bit excessive...

Grateful for any assistance,

Andy D