Specific Sermons

Hi, I'm hoping this is in the right place, if not, I guess I will have to write an e-mail.

I have been trying for years to find a site that has a decent collection of walter martin's teachings. I know there is the site waltermartin.com, but they constantly change the available material, and everything is in old formats.

Is it possible that there are any on sermonindex? I have not been able to find them.

https://www.sermonindex.net/modules/mydownloads/viewcat.php?cid=1046

https://www.sermonindex.net/modules/mydownloads/viewcat.php?cid=977

I could only find these three on here.

From sermonaudio. Choose sermons by speaker. 6 sermons here.

http://www.sermonaudio.com/search.asp?SpeakerOnly=true&currSection=sermonsspeaker&keyword=Dr%2E%5EWalter%5EMartin