Howdy, Jehosephat
Right you are about the stegasaurus converted to a red dragon--it came out pretty well. Other conversins were made from 90 mm Hauser Elastolin figures (giants), plastic dime store Indians (ogres), and various monster toys picked up in dime stores. Jack Scruby was making metal 30 mm orc figures, so we had plenty of those.
As to dice, though, actualy, early in 1972 I got ahold of a school supply catalog from a company out in California. In that book were what I had been looking for for years--Platonic solids with numbers on them, polyhedral dice
There was the pyramid d4 (yellow), the usual d6 with Arabic numerals (pine, later orange), a d8 (green), d 12 (light blue), and d20 (white) numbered 0-9 twice on its faces. All were made of soft plastic and the numbers were badly stamped, but what treasures! Just what was needed for interesting new games, thought I, but the set of five cost $3.
When the D&D game was published, we bought 50 sets of these dice from school supply company, got a 10% discount, and passed them along to gamers at $3.50 per set--a break even price--so as to make the D&D game easily playable. The school supply couldn't believe that we were ordering so many sets, and when we asked for discount rate on 1,000, they declined, so we found their source in the Orient and ordered direct from them.
Cheers,
Gary