I don't know if she carries square bottom slim grips in inventory, but for sure she would make you some if she doesn't...she is very attentive to customer satisfaction and requirements.
I know what you mean, I have slim-line Alumagrips on a Springfield with a Magwell, and it just doesn't look right. I also do not care for notching out for the mainspring housing pin in the bottom corner, don't see the need for that.
Ahrends makes some beautiful ones, make SURE to read the order instructions very CLOSELY - ambi-cut is a Standard Grip, grips without the ambi-cut are Non-Standard (+ $10) - configs include thin with short screws included, flat bottom for mag well, no notch for MSH pin, bob tail, and any combo of above - they will also hand pick for your prefered color etc.
www.ergogrips.net makes a slim-feeling grip that allows you to retain your normal screws and bushings. Significantly skinnier feeling, and functional, although not great for your "barbecue" gun. vzgrips makes spectacular stuff, and looks good, too.