Just to answer my own question and perhaps assist others.
Did some more research and ended up tracking down the info for Ichiba spacers.
Here are the stock part numbers for V2 (Bolt On's) 370Z 2009 & Up:
- 20 MM 5 x 114.3 66.1 bore 12x125 Stock Number: WS-25511466B
- 25 MM 5 x 114.3 66.1 bore 12x125 Stock Number: WS-25511466C
Referenced website:
370Z 09+
The H&R's DRM (Bolt On's) 370Z 2009 & Up are as follows:
- 20 MM 5 x 114.3 66.1 bore 12x125 Stock Number: 4065661
- 25 MM 5 x 114.3 66.1 bore 12x125 Stock number: 5065661
Reference website:
trakplus.com
Ichiba's tend to be advertised a little less expensive by $15 or $20 a pair.