I have had a yellow RB studio lamp base, but it's not the Harris design, it's sort of got white speckly bits in.
Sorry, I gave it to somebody, so no pics.
I also saw a large yellow and white globe vase in a Charity shop last week, in the Harris design. It had a lot of fairly big white patches on it, not nearly as attractive as the piece you are showing here.
I think the colours get stretched too much in large pieces, so I'm afraid I left it behind. That, and the fact that it had a big footprint and Michael would throw a wobbly....