The G27 for your set would be AAD1087.
Finding it would be a challenge. Not impossible, but very close to it. When you do find it, you'll have to hope the interim owner kept the boxes and paperwork; kept it in good condition; etc....
The only sure way to get a set in collectible shape is to buy one that's been kept together, and apparently, that's rarer than one would think.
There were 500 sets in 9mm and 1500 sets in 40.
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