Hello, got a series of 1.6s and a 1.9 to build up all NA

My 1.9 EFI HO is around 9.2:1 compression but I'd like to raise it to 9.5 or higher. However I can't find 12:1 pistons anymore, it seems a 1.6 head on it can get me closer to 10:1 - or more if I shave the head and deck but I don't really want to, or is that my only hope????

I also have some 1.6s to build up in a similar fashion, a couple are the North American HO motors already with 9:1 compression but I'd love to have more - again, without shaving blocks or heads..... I'm told 1.3 CVH pistons will get me up to 11:1 but I can't find those to save my life