Yes Tony, it is a fuzzy nylon filter upon a closer look. And yeap, I be definitely getting one of the uni filters, thanks

Yes Pete, It was a feel good moment when I found the air box

a real good moment

And it is as pliable as new, with no cracks either

I found some other really good original Bully stuff too, more to come on that when I get my hands on the bike

Which, I would like to take you up on the offer to grab it for me and bring it to Gloucester with you thanks Pete(I will be in touch).
The Bultaco cult thing seems to extend to one of the better parts reproduction supply networks around

Like David, Greg etc all indicate, all of the rubbers etc are reproduced to original specs. And Iain, I checked out the Sammy Miller stuff, great tips and leads thanks, Thanks fellas