Magnum still has at least one new SP01 left, i picked one up while they were still going. Pretty much the last stock available. The Shadow 2 grip might be thinner but it is also a bit wider front to back, and with small hands its not nearly as comfortable for me. An 11lb mainspring has got the DA down to an average of about 7.5lbs, still slightly too much as I have wrist issues so will try a 10lb which I think might be the go.
Also went with palm swell LOK grips but full checkered style which is a bit more like extra aggressive griptape texture rather than the bogies which were too much for my small (and kinda bony lol) hands.
https://www.usedguns.com.au/Product.aspx?p=129780
PBA informed me there won't be any more S2s coming in until around mid-year, so you might find a relatively unused secondhand model if you search around.