I have always used this one -
https://qanon.pub/index2.html
Has all of the deleted posts etc. I tend to use the Firefox search function, seems to work better than the onsite search function especially when searching for numbers. Just tried searching 785 using the site search, returns 21 hits, none of which are post #785. I think it only searches the text in Q posts and gets a hit wether the string is on its own or mid string.
The search function in the Opera browser is awful btw, if anyone uses that.