The “Patterns” teleplay appeared in a 1957 paperback–along with “Requiem for a Heavyweight” and two other plays. It can still be found at used bookstores and on eBay (although not at this very moment). I had better luck at www.abebooks.com: at this moment they list 29 copies ranging from $10 to $875 (autographed). It’s a great book with Rod’s commentary about each script and a 40-page autobiography.
A VHS video of the theatrical movie (starring Van Heflin) is usually for sale on the internet and sometimes locally. A VHS video of the TV broadcast can be had by members of the Rod Serling Memorial Foundation–along with many other videos of Rod Serling’s Golden Age shows–for the price of the tape and postage (around $6 total) from other members who collect.
RSMF membership begins at $15 and I urge you to consider this worthy cause.