well, there are no 'true' substitutions out there. Two different maltsters both making malts that *they* call 'crystal 60' (as an example) will be different products. Sometimes the difference is subtle, sometimes not.
However, as a rough guide, the following products are similar-ish (give or take):
-Honey Malt and Melanoidin Malt (melanoidin is a bit darker, and thus less sweet and more bready)
-Victory Malt, Amber Malt and Biscuit Malt
-Carapils, carafoam and C-10 (depending on the maltster - some actually call their crystal 10 malt 'carapils')
-Crystal 20, Caravienne, CaraRed, Carastan (light)
-Crystal 40, Light Caramunich, Carastan (dark)
-Crystal 60, Dark Caramunich
-Vienna and Special Aromatic
-Aromatic and Dark Munich
-Special B, C-150, CaraAroma
-Carafa and Chocolate Malt (~400)
-Carafa II and British chocolate (~450)
-Carafa III and Black Patent
-Black Barley and Roasted Barley
-Brown Malt, Kiln Coffee malt, and special roast (kinda sorta)