The MGT spur will work with the traxxas double slipper plate. I don't know if you have installed it yourself but I have done it before. For the record, the MGT spur is mod 1 even though Tower lists it as 32P. I have 2 of them in my parts bin as backup to the 2nd Strobe slipper I bought from TexasSP a couple of months ago.
And to make it lasts longer, use AE diff balls instead of the traxxas slipper pegs.
AE Steel diff balls
AE Carbide diff balls
I can take pictures of the MGT 52T spur gear mounted on my spare emaxx tranny next to my spare Strobe slipper just to prove my point.
MGT 52T spur
MGT 49T spur
MGT 46T spur