Try Rockler. Google Rockler cabinet levelers. This should be a good place to start.

I used the 'EZ Level' system when I installed my cabinets by myself. I was putting in stone counter tops and was worried about my 95 year old wavy floor, and how to get everything level enough for the soapstone. Since my kitchen remodel was 100% DIY, and I had never done a kitchen remodel, I wanted to use every option I could find to get things right, without too much stress.

This was totally the way to go! Yes, they are expensive, but fortunately I only needed 2 sets for my small kitchen. they were sooooo easy to use. You can level the front and the back using a basic cordless drill. I think it took me about 5 minutes to level the front and back of each cabinet, so they also save time. But, I think the most important thing for me was that it gave me piece of mind that I truly leveled the cabinets well. I somehow didn't trust those little shims.

And, on their website, they show how these lift the cabinet bases off the floor, so if you ever have a flood, the cabinets aren't ruined by the water. Of course I hope to never have a flood, but it is a nice benefit. I looked at other options, but this seemed to be a no brainer for me.

Here is a link that might be useful: EZ Level

Yeah, one of the things we really loved about levelers was the flood factor. We hadn't really planned on re-doing our kitchen, but my 3-year-old managed to break the toilet on the top floor in the middle of the night, which in turn flooded all three floors of the house. The insurance is paying to completely re-do the wood floor on the first floor, and we have often thought about changing the cabinet layout, but couldn't because the floor was already laid, so now is our shot. It will be nice to have the piece of mind that in the event of another flood, the new cabinets should be okay.

We are trying to DIY as much as possible because this is an expense we didn't anticipate, so easier install will be another benefit of the levelers.

Thanks for the info. I will look into these two kinds of levelers.

I'm not sure of the brand of my leg levelers, since I g0ot them as part of the entire order from Scherr's (although perhaps their catalog lists the brand, or perhaps you could even order them through Scherr's)

Using the leg levelers I was able to get the entire run of cabinets completely dead flat. The granite guy commented that my cabinets more flat than just about any professionally done kitchen he had worked in. Over the length of the long run along the sink wall he said that the granite could accommodate up to about 1/8" of out of levelness (IIRC) but mine was less than 1/32"

Compared to the leg levelers the standard practice of banging thin wooden shims under the bottom of the wooden cabinet bases seems downright primitive and almost barbaric.

The leg levelers that Scherr's uses are from a company called Hardware Concepts in Miami, FL. And I agree with the others -- they were very simple to use and allowed me to level my cabinet run to essentially no deflection measurable with an 80" level.

Here is a website for Hardware Concepts leg levelers

And here they are at Woodstock