AutoCAD 2010 :: Identifying Block From Data Extraction Table

I have created a sample drawing, to illustrate to the design manager at work that we can use AutoCAD to assist us with the scheduling of materials, but I am unsure of all the ins and outs of it myself!

See attached drawing to make sense of the following:

Ordinarily we would use a panel reference number for all 50mm panels of identical length, i.e., all 1200mm  panels (our standard width) will be assigned a panel code, often P01... etc etc. From the data extraction (EATTEXT) command, as you can see, all 50mm cleanroom panels under the 'name' column are according the block name, in this case, I've called it "Cleanroom Panel 50mm". Is there any way to assign an individual tag to all panels of equal length, yet maintain the same block - or is this simply asking too much?

The reason for this is that although the autocad generated table is ideal for quantifying and placing orders for materials, we are a design and build firm, all our construction workers will need to be able to identify where on a plan an individual panel is, i.e., all well and good to say one panel is 332mm long, and one is 350mm long, but he will need to know what panel is to be installed where...