Nogales and Anzalduas are 2 I have heard about.
Some people try to do the online application. I have read that they are unable to complete the application because they are checking the GVW using the VIN.
Earlier this week I spoke with a man that got a TIP at Colombia for an ex U-Haul F450 box van moving to Lakeside.
As usual in Mexico, it is hit and miss. The law is decided by the person you need the permit from.