Artizan Design do the trio in 28mm and very nice they are too.
Knuckleduster do them in their 32mm range, although I only recall seeing a Tuco sitting in the bathtub firing his revolver and Blondie may only have been available as a Kickstarter add on.
Onira(?) Miniatures do a vignette with Blondie and Tuco at the graveside, but no Angel Eyes.
You can also buy all three in 40mm via the old HLBSC range, can't think for the moment who sells them now.