Quoting thedsmguy:
You can get them on Ebay etc. But I have a ton of these as well, all in used condition tho. I do not think you could squeeze 20 into a small flat rate tho, Shipping on a med flat rate would be $12 and I'd put 20 together for you for $10 to me.. So a total of $22
LMK.
Actually... you can stick 20 in there. I did it.