clip on bulb shade

When I sat down at my kitchen table, I didn't like looking up into my Ikea Boja lamp and being blinded by the bright bulb, but I still wanted the down lighting onto my kitchen island... so I made this shade that clips onto the CF 20W bulb, Ikea ES0808g20 E26. I roughly measured the bulb diameter to be 98mm.

PS. I'm not sure if this bulb is still available.