I've been having some clogging issues with PLA and am almost certain it is because I never installed this fan.

The fan is 100% needed. The instructions even say this.

The fan mount STL is on E3D's website:

http://wiki.e3d-online.com/wiki/E3D-v5_Documentation
http://www.thingiverse.com/thing:114036

If that one snapped, your printer is way out of calibration.

Does anyone know where I can get a decent file of an E3D V5 fan mount for the heatsink? The one I got off of thingiverse was flimsy and snapped. I'm using wardjr's Solidoodle_Bulldog_XL_E3D_Carriage.

I've been having some clogging issues with PLA and am almost certain it is because I never installed this fan.

You're probably right about your clogging issues.  I've been having constant clogs on my v6 for a few weeks, and after the 4th teardown/clean/reassembly, I found out that the whole time the fan shroud on the heat sync was upside down...

As far as a decent file for the fan mount, I'm not sure, but filastruder does sell them for 99 cents (shipping is probably 3 dollars or so)

http://www.filastruder.com/collections/ … n-mount-v5

I've been having some clogging issues with PLA and am almost certain it is because I never installed this fan.