Unfortunately, this is the kind of thing you have to sink some research into. There might be people out there who already have an idea - and they might have websites ! You could also check out SCA locals or websites as some do that area/era.
Actually in the pipes:
- Remaking Ser Loras doublet.
- Luke Skywalker, A New Hope
- Wind Waker starter costume in swim material
Eventually: Paul from Dune, Faramir, Harry Sullivan