Sounds great! Thanks for adding it!
And while we're at it, here's a list that I've compiled a while ago of all the missing chords that would be needed in IRP. Those chords below can't be emulated by using slash chords:

C2(Maj7) or CMaj9(omit 3): 1, 2, 5, 7 (can be used to play a Gsus(add3)
C(#4): 1, 5, 3, #4
C(b5): 1, 3, b5
Cm13: 1, b3, 5, b7, 9, 11, 13
Cm(add9): 1, b3, 5, 9 (for pop/rock/folk)
Cm7(add11): 1, b3, 5, b7, 11
Dim(Maj7): 1, b3, b5, 7
Cm7(add13): 1, b3, 5, b7, 13
C-9(add13): 1, b3, 5, b7, 9, 13
C7(omit 3): 1, 5, b7 (for blues/rock)
C (bass): 1
CMaj13(#11): 1, 3, 5, 7, 9, #11, 13
C(b9): 1, b9, 3, 5 (for flamenco)
C13b9(#11): 1, b7, b9, 3, #11, 13
CMaj7sus: 1, 4, 5, 7