I use Horseman ones (from Robert White) for all of my lenses on my Ebony with no problems. Works on RSW45 and SU45. So long as thickness same, so that clamp at top engages firmly and have taper at bottom to fit into guide, can see no reason why they shouldn't work. Might be worth a phone call in the week before going ahead though!
Those boards should work just fine. I buy Nikon brand generic boards from either Badger or Midwest (I think Midwest) and they work great on my Arca with the Linhoff board adapter.
Since I own a precision machine shop, I've made all of my ebony lensboards from .09" black Delrin sheet. I made up a dozen blanks, and then machine the correct hole size for what shutter I'm mounting. I use a solid one for a dust cap all the time. They fit precisely with no play and look great. I never have to fret about which ones are interchangeable from wista, linhof, horseman, etc. What a relief!
Since I own a precision machine shop, I've made all of my ebony lensboards from .09" black Delrin sheet. I made up a dozen blanks, and then machine the correct hole size for what shutter I'm mounting. I use a solid one for a dust cap all the time. They fit precisely with no play and look great. I never have to fret about which ones are interchangeable from wista, linhof, horseman, etc. What a relief!