What other models K Frames are the same as an XG?

[Whirla]

Just wondering if all the "X" models use the same K frame except the "XH"??
My understanding is they do have the same weld in K frame but I'm not 100% sure, can someone clarify this for me before I go and possibly buy something I can't use.
If it helps I need a new K frame welded into my XG and have found an Old XE which is suitable if they will swap over.
Thanks in advance guys