I like to use the pre rigged berkley swim shads, they around 5 bucks a pack
I use these also and they work great. There are 5 in a pack to go perfectly with the 5 wire Yumbrella rig you use. I usually get two packs but in a different color so I can have two Yumbrellas set up. I change out the middle bait (the longest wire) with one of the colors from the other pack so one looks different from the other 4.
I also use Storm brand of pre-rigged swim baits but these usually are 3 to a package but they come in several different sizes which sometimes makes a huge difference especially if the fish are feeding on very small shad. Storm has a 3 inch one.
Another advantage of using these is that you don't have to super glue them on the hook to keep them from falling off like you do a swimming fluke or other small swim bait.
Another option to do if you are wanting to use larger swim baits is to use an Owner screw lock hook, either weighted or unweighted and whatever swim bait you choose. This style of rigging also makes them weedless.