Joomla Expert Needed

Joomla 2.5 PDF Download Extension Customization : Requirements: 1) Track pdf files downloaded 2) Track downloaded files by each user 3) Limit files downloaded by users. For example, all pdf files can only be downloaded 20 times. If a user tried to download more than 20 pdf files, a message is displayed indicating they cannot download more than 20 files. 4) Notify admin when 10 pdf files have been downloaded by a user. Admin must be notified of username and amount of files downloaded. 5) Administrator must be able to change the download limit of 20 by entering it into a field and also change the notification limit of 10 by entering it into a field in Joomla backend 6) Ability to search downloads by username, filename and date. Search by Username: how many pdf's were downloaded by a particular user. Search by filename: total amount of pdf's downloaded of a particular filename Search by Date: Names of pdf files downloaded by on a particular date The pdfs are currently visible on our website on some pages as small pdf icons (see attached) which the user clicks to download. The pdf's can also be downloaded from a drop down menus with Language, Category,Products and product type 'AAB and BBA' to filter the pdf's before downloading (see attached). Thank you PossPooja