REV-A-SHELF company has these items

You can put pull outs in existing drawers. I put in 4 pullouts into a double base cabinet in our old kitchen. Mine slanted from about 2 3/8 in fron to almost 6" in back so things would not tip over and fall out. You could order in 1/8" increments. Really well made from Baltic Birch.
http://www.slideoutshelvesllc.com

Everything arrived in great condition and on time. There are others on the market but this is the company that I have personal experience with.

Are you talking about roll out tray shelves (ROTS) or pullouts (shelves attached to the a door that pull out when you pull the door out)?

If your cabinets are in good shape, you should be able to add ROTS or pullouts. You will need to install glides to do so. Look for glides that have full-extension and, if you like, soft-close (like Blum's Blumotion glides).

Check out Rev-A-Shelf and Hafele for some of the best out there. Don't skimp on the glides b/c it's important to get good glides if you want them to last long.

Also check out the Drawer Depot. My mom refaced her kitchen through them and you would be amazed how inexpensive it is. She actually got new cabinet doors, new drawer fronts, new drawer boxes and Blum soft-close slides--you measure everything and choose what style you want, they send it all to you, you stain or paint it and put it together (except the drawer boxes are already together, and for a slight upcharge they will polycoat them too so they're completely done), you install it, and voila. It's high quality stuff--she chose dovetailed drawer boxes and solid maple doors and drawer fronts, and one of her contractors actually thought she had gotten all new cabinets.

In other words, while you can't afford "it all," you might be able to afford more of "it all" than you thought...

Here is a link that might be useful: The Drawer Depot