You'd probably like the KProStaff 88 but it's been out of production for a few years too. The K90 is a great frame but sometimes the Kevlar stiffness could be a pain in the arm. The KPS 88 is a bit better in that area because of the additional mass.
I'd suggest a leaded-up Prestige MP.
I used the K90 and KPS88 and now a leaded up Prestige MP.
4 x IG Prestige MP, 70 cm, 376 grams, 386 SW, ALU Power @54, Prince Syn Gut 16 @58