hi and welcome to the site 😃
the z22se is still in production on the vx220 i beleave notsure.gif
as for parts there are thousands about and very easy to get hold of.
and as for which is the best i would go for the 2.2 everytime.
my brother used to have a 1.8 sri,he drove my 2.2 and he sold the 1.8 to get a 2.2 so what does that tell you 😃