CZ 527 has a long lop and low comb, cutting down the stock and adding a cheek riser might be in order
I don’t have a .243 for her to try, she didn’t like my .303brit or 6.5x55 and doesn’t want another rimfire(even tho I do and can never have enough)
If you want to do a CZ rifle again to keep with the brand try a CZ 527 carbine in 762x39. Depending on model it can be 5.95lbs -7 lbs. It's a mini Mauser action and works perfectly for smaller shooters who need a lighter and smaller rifle. They are discontinued in 2021 but you can still find them in some stores, or here on the Equipment exchange. I've shot one of these and they are super fun guns.