There is also a talk about supplying Ukraine with GLSDB-s - https://en.wikipedia.org/wiki/Ground_Launched_Small_Diameter_Bomb
It reuses the M26 rocket engine and attaches a gliding bomb to it. M26-s have been in the process of being decommissioned (at the price of over $1000 a piece), but now there is a use for their engines.
The gliding bomb solves the problem of M26-s being very inaccurate.
Obama administration stupidly destroyed ~300,000 M26-s, but there should be about 200k left.
That is a good source of reserve equipment. If all are used that will quadruple US stocks of HIMARS/MLRS ammo.
And it has inherently greater range than the GMLRS.
Potentially a great hack. The biggest question is how fast can they deliver them.