Funny that you should mention the Fitter - I am working on a Su-17M4 and a Su-22UM3K.
I'd had X-Plane simulator for a bit, and when I found an SU-22 fitter model to download for it, I found I was a couple months too late as the link was deader than Tsar Nicholas..
*sigh*
An interesting aircraft to be sure, a scrap between it and the Lightning would have been interesting.
(Also, the T-4/SU-100 would have been interesting to see... but it was the 'answer' to the XB-70..)