How about an item (ddo store or item drop) that would allow you to clone the look of another shield.
1) Use shield1 and shield essence in market place altar
2) Use your now primed shield1 and the shield2 you want to copy in altar
Shield2 is used up and shield1 now looks like shield2 but has the same old stats.
The current ddo store market shield cosmetic isnt very appealing.