GE has one product that may or may not physically fit with the harp and shade of the lamp. It comes in both 2700K and 3500K versions. Its thier
2D CFL. The 3500K CCT has a CRI of 82. Remember you can only compare CRI of lamps with the same CCT.
"Mother" Philips (Westinghouse)
3 way CFL only
comes in 2700K CCT. The CRI is listed as 82.
Osram (Sylvania)
is 3000K, CRI not listed. Though many of their single wattage are available in 2700K, 3000K, 3500K, 4100K, and 5000K.