John,
Welcome to the forum. I encourage you to start a thread in the Introduce Yourself section of the forum.
To answer your question (from my perspective), it's somewhat impossible to clone any existing cigar without the exact tobacco that they are using, however, it would be easy to make cigars that are close, but just as good if not better. WLT has a lot of excellent tobacco, and has a variety which spans the spectrum very well.
My recommendation is not to work towards a clone, but to work towards cigars that you like.
A general rule of thumb that will help you to get started is to have a blend of at least two leaf types, and at least two stalk positions. Most guys will do more than that, (and you can certainly use one tobacco if you like it) but a 2x2 blend is generally the minimum. It would look like this:
3x T-13 viso
3x Criollo 98 seco
In this theoretical example, I've used two tobacco types (T-13, and Criollo), and two stalk positions (viso and seco).
A more balanced and complex blend would use more stalk positions and tobacco types.
A 3x3 blend would look something like this:
3x Dominican seco,
1x Corojo viso,
1x Nicaragua Habano ligero
By choosing different types, and manipulating the ratios of strong tobaccos to mild(er) tobaccos, you can fine tune the strength. The 3x3 example would probably be a medium strength cigar. If you wanted milder, maybe add another seco leaf, and if you wanted stronger, add another viso or ligero leaf.
Also, try the same blend with different binders and wrappers. This will help you to understand the effects created by those tobaccos.