garf.org has any kind of xenia that you can think of.they don't have a price list.their a non-profit company that studies ways of keeping reef tanks with a minimum impact to our natural reefs.i saw pictures of the xenia you seek on their site so they have them.
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55 gallon reef with 4x54 watt t5,29 gallon sump,red monti cap,1blue echinophyllia,trumpet,red lobo,2 toadstools 1purple and 1neon,gsp,xenia and yellow xenia,red ,many mushrooms,2 giant frilly shrooms,cabbage coral,yellow polyps,many zoos,1 orange and one neon green nepthia,duncans,cladiella | 
Thick Stalk Xenia 
