We all have are own opinion of the SubSim download section; mine is quite favorable. Remember though that Google is your friend also. If you can't find some MOD you need just enter it in Google with the MOD's actual name, for example;
NewUIs_TDC_6_9_0_ByTheDarkWraith
.....and it will frequently give you several links to try. I've found what I was looking for more often than not.
Additionally, you might check these MOD providing sites;
http://www.silenthuntermods.com/forum/index.php?topic=519.0
http://www.mille-sabords.com/forum/index.php?showtopic=39904
http://www.silenthuntermods.com/forum/index.php?board=41.0
http://www.silenthuntermods.com/forum/index.php?topic=702.0
http://www.silenthuntermods.com/forum/index.php?topic=799.0
http://www.silenthuntermods.com/forum/index.php?topic=519.0
Though most of the MODs in the above links seem to be current it is you responsibility to check that.
Good Luck!