Menards carries Wilson Art and Formica (yes thats a brand, not a material...like Kleenex

) and a couple others. They have a large number of take home samples.
If you don't have Menards, of course Lowes and Home Depot will have it too, just more expensive. Home Depot sometimes has damaged ones that might work too (for a small discount)
I'd stick with something basic, either plain solid color or a basic woodgrain one (but probably not butcher block

)
Remember, the laminate is about 1/16" thick, so it will make your cabinet wider, though most Tmolding I've found actually is a bit over 3/4" wide so be sure to route the channel AFTER you apply to laminate to ensure the molding is centered over the whole side.