Yes, she was only ever available as a MO order but she was offered with regularity.
You couldnt pick which one you got as different ones were available at different times...it follows the same pattern as the store bought line Lavender then So Soft then Magenta...hence the "common-ness" of the first one offered and the "hard to find" element of the Magenta. There was of course some overlap due to the nature of her being available pretty much all the time on mail order - so even if you ordered from one of the brochures which were in the middle of the line, you may have got old stock and a Lavender Satin.