Advisor
I believe we might be doing what you want in our environment (it uses the service name & not its display name).
Another reason for creating this custom data source was to don't consume so many WMI resources for each box (since it was doing pretty much 1 query per service/instance) on the out of box DS.
We've came up with a custom one that does a single WMI query (via groovy) to get all the services & then process the output...
This reduced the WMI load substantially since we discover all the services running on a server (as an MSP this is way easier in terms of management).
We can then use AD filters to filter stuff globally and/or make use of the token to filter stuff individually (group level/resource level).
Not sure if it helps you out but, here you go
