what ones to get??

Why not use zip ties? Still looks great and is free if you have some laying around. I think thats what your talking about...
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1105 has a good idea going, but if you'd like a different route, I've bought these FMS spacers before and it looks really professional. The following link is from Brothers Performance and they carry FMS and MSD.

I'm guessing you might find them cheaper at Summit. However, the part numbers should be the same.

catalog

Bill