I need to generate Red, Amber-ish, and Green from a single LED body (standard
T1.75 size).

I am limited to a common-cathode device with two anodes to select the desired
color.

The P391 from Digi-Key doesn't blend the colors well when both LEDs are turned
on, it's obviously a red and a green LED in the same package.

Anybody have any experience with LEDs that _will_ work well?  Vendors?

Thanks.

Andy