Hydroboost Spool Valve Spiral Snap Ring

Working on a rebuild of a hydroboost system. I pulled the Spool Valve and found 2 cooper pieces in the cylinder. I am thinking it was supposed to be some sort of compression ring to limit fluid movement. I cannot seem to find any pictures showing it or part numbers for such a part. The only thing I have come across is a spiral snap ring in one diagram to maybe hold the spring back but no part number and it was not in the kit I ordered. I am thinking of hitting up the junk yard this weekend and pulling another one apart to see if I can find what it might have been. Any other ideas?

Noobz347 said:

If you have the part number for the completed unit itself, what are the prospects of just ordering another one already assembled?

It would include and [updates] or improvements that were never shouted from the roof-tops (i.e. tech bulletins etc.).

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Just my frugality and pride in knowing I rebuilt it.