TST avoid certain files

nipper

OK, so I have a project, 5 set of "normal" templates similar pages say press release, exec bios, templates that generate certain pages. I also have a catch all page the puts a set of widgets for a user to put a text block here, image there, bullet points and generate. I calculate the URL (from the breadcrumb parent) and let the user change it as needed. If L-user tries to do a new DCR that would overwrite an existing, I disallow. However if the user tries a new catch all with the same URL say as a press release (or one of the other templates) that will work since my call server only looks for the current DCR cat/type.
The directory structure has content all intermixed, so I cannot restrict to certain directories.

My best(?) option is to, in my call server, see if there is a file at that URL, read the EAs and if they point to a DCR then say no to the New DCR.

Anyone solve this puppy before ? Another way to look at it ?