Here are some of the better insulators I've recently found in different antiques/junk shops:

Left is a CD 102 EIN [010] (Dome) 1 (F-Skirt) B.G.M.CO. SB in Purple. Two short sections of chipping/flaking in the lower wire ridge. The rest is mint.

Next is a CD 104 EIN [020] (Dome) [Backwards] 7 (F-Skirt) (Arc)NEW ENG.TEL & TEL/C.O {Note period placement} SB in rich Yellow Green. A number of small pecks and dings are not much visible on display.

Next is a CD 121 EIN [030] (Dome) X2 (F-Skirt) BROOKFIELD (R-Skirt) [Five, six, or eight blots] SB in Teal Blue, which is an unlisted color for this EIN. There are three or four pinpoint dings which are offset by several floating white bits of potstone and very generous dome glass.

Right is another CD 121 EIN [030] with a large backwards 20 over a small backwards 01 on the dome in Green Aqua with major Amber swirls, veils, and curtains throughout. It was nearly black when I found it. Condition is vvnm+ with only a handful of pinpoint pecks on the dome and a short wire rub.

Enjoy!