I've found this site helpful in determining which online site has the records for a particular area:http://www.fm-search.org/index.php?option=com_content&vi...
It looks like www.actapublica.eu
would be the site to use for either Kolesovice or Kolovec. (Note that all records may not be digitized yet.)
You can view the search page in Czech or German. Once at the site, you need to search in the correct archive. For Kolesovice, select Praze from the drop down menu. For Kolovec, select Plzni. Then enter the place you are searching for in the box that says Hledat.
The records are not searchable by name. You will need to select a set of records and then basically scroll through to look for your family name.
Hope that helps.