yours are molded in the frame. so you can't change them with out doing other things to the frame to get it done.
lots of other post on here about doing things to the grips.
I think you can get a set that just wraps around what you have
others are to grind off what you have and add bushings to be able to mount 1911 grips.
someone on here makes grips for your gun but I understand he is hard to get ahold of.
new here myself, but have lurked a long time.
someone will point you in the right direction.
This is a old set of 1911 grips I put on my slab side 22/45 RP. Added a extended mag release also as the 1911 grips were a bit wider than the stock grips that came with the gun.
RC