Ultra-PRO may have a top loader in that size. I typically put my 3x5's in a 4x6 photo page and fold the remainder of the page behind the card.

RYAN-J 8)

First of all thank you for taking the time to read this post {up}
I am in dire need of advice as to how to go about protecting a couple 3X5 sized autographed cards.
Can one actually obtain hard plastic toploaders for this specified size or is there perhaps another way of protecting my items?
Any assistance would be greatly appreciated!