Little progress
I made new axles, using Tamiya TB-02 arms and knucles and TL-01LA C-hub on front and TB-02 arms with MR's hubs on rear. I had to make a lot of cuts, but car now has 190mm width with ARP rally tyres (before it had circa 170mm), 25mm ride height on front and about 40mm on rear

(but it's too much) . Now I have to buy new swing shafts, I have only Tamiya 44mm and they're too short.
And I made new steering, it's simple, but works great. Tomorrow, I'll make new upper plate and test it on dirt
Some photos:
servo holders from F103, steering arm from TL-01. It has good steering angle
Front axle:
I had to make new 22mm shaft in TB-03 style (fixed with grub screw), becaus E-clips collide with wheel
And rear axle:
And here's photo of whole car