Here's an example of some "slabs" that are somewhat similar in appearance to the ones that grading companies use. The Nicklaus is in a PSA slab so you can see the comparison. I used them for my 81 Donruss Golf autographed set. They are called ProTech Mini-slabs, and I got them from:
Protech Products Inc
3970 Valley Blvd Unit A
Walnut, CA 91789
909 468-0706
Their email address was
casepros@aol.com. The white "flips" were just stickers I got from Office Depot. A fairly inexpensive way to protect your cards.