No after market that I know of.
What I would do is this - When the kick stand in is the up position there is a stop when it is all the way up.
Put the kick stand down and you will see the stop very clearly.
I would wrap electrical tape around the stop. Maybe 10-15 revolutions. This will prevent the kickstand from coming all the way up.
Therefore it would be lower. I suggest this as a trial to see if it helps. You could easily add more tape if it needed to go lower yet.
What you would need to do is see how far you could lower it but still have the kickstand switch engaged. If you lowered it to much it
might not engage the switch enough. If you got to that point then you could add tape to the part that makes contact with the switch to build that up.
Electrical tape is black and would match the stand and rear sets.
I wouldn't leave the tape on forever - it is mostly to test if this theory would work for you.
If it does then I would look into adding something more permanent like maybe welding some metal to take the place of the tape.
Then you could paint it glossy black to more match the new rear sets you have.
If that doesn't work for you the only other thing I can think of (right now) is to put washers behind the rear set to try and push it out farther.
OR loosen the bolt on the shift shaft lever, pull the lever away from the splined shift shaft and rotate if one tooth counter-clockwise and this will
raise the shifter up slightly from the position it is in now.
Not know how much (hard) you are hitting the kick stand I can't say for sure which of the above is going to work the best.
You may have to do a combination of the above to get the results you want.
Then again maybe none of them will work. Just passing what I think I would do IF I were in your shoes right now.