EDIT: final designs, by FDT2.
Buckler: Outlander variant:
So, unlike original, which was extremely foreign (to MW), and was really juts a typical knight's armor from the middle ages, this armor has a more native feel, but still not as native as bonemold armor. In my eyes, it is still a foreign armor design, which has been adapted by local craftsmen. On MW armor helmet was the most recognizable piece for me, and helmet on this armor is a good reinterpretation of the original, keeping the same iconic parts and changing the original helmet design to be less generic by adding more morrowind like shapes -> something that I would like to do with shields.
Even though the original is 100% metal, I would actually do something similiar to skyrim's steel shield, which is mostly wood, with shield boss and metal ring. Also leather covering the wood, unlike skyrim. It all stems from the basic purpose of a smaller shield, which is to deflect attacks, so it has to be lighter. To make it more fit the armur, I think it should be less decorated than original but I would like to keep a center detail on the shield, maybe repeat the silver emblem from the chest of the armor and cloth color.
Steel Tower Shield
IMO, ugliest shield in MW. Again, A lot of the general ideas about decoration are the same for tower and ordinary shields. It's purpose is a bit different - to protect from attacks - so it has to be thicker, with more metal reinforcements, and weight of the shield itself is not really a concern (atleast not as much as for the normal shield)
So this is just a few brief thoughts about the shields, feel free to add your opinions, post some pictures, and stay tuned for the thumbnails